“Please encourage your families, your quorum members, everyone to learn and become better educated. If formal education is not available, do not allow that to prevent you from acquiring all the knowledge you can. Under such circumstances, the best books, in a sense, can become your “university”—a classroom that is always open and admits all who apply. Strive to increase your knowledge of all that is “virtuous, lovely, or of good report or praiseworthy.” Seek knowledge “by study and also by faith.”

Elder Uchtdorf
General Conference, Oct. 2009
https://www.lds.org/general-conference/print/2009/10/two-principles-for-any-economy?lang=eng

"We look at this story from a distance and smile. After all, we know what an elephant looks like. We have read about them and watched them on film, and many of us have even seen one with our own eyes. We believe we know the truth of what an elephant is. That someone could make a judgment based on one aspect of truth and apply it to the whole seems absurd or even unbelievable. On the other hand, can’t we recognize ourselves in these six blind men? Have we ever been guilty of the same pattern of thought?

I suppose the reason this story has remained so popular in so many cultures and over so many years is because of its universal application. The Apostle Paul said that in this world the light is dim and we see only part of the truth as though we are looking “through a glass, darkly.” And yet it seems to be part of our nature as human beings to make assumptions about people, politics, and piety based on our incomplete and often misleading experience...

The “truths” we cling to shape the quality of our societies as well as our individual characters. All too often these “truths” are based on incomplete and inaccurate evidence, and at times they serve very selfish motives.

Part of the reason for poor judgment comes from the tendency of mankind to blur the line between belief and truth. We too often confuse belief with truth, thinking that because something makes sense or is convenient, it must be true. Conversely, we sometimes don’t believe truth or reject it — because it would require us to change or admit that we were wrong. Often, truth is rejected because it doesn’t appear to be consistent with previous experiences.

When the opinions or “truths” of others contradict our own, instead of considering the possibility that there could be information that might be helpful and augment or complement what we know, we often jump to conclusions or make assumptions that the other person is misinformed, mentally challenged, or even intentionally trying to deceive.”

Elder Uchtdorf

http://www.lds.org/broadcasts/article/ces-devotionals/2013/01/what-is-truth?lang=eng

"We seek for truth wherever we may find it. The Prophet Joseph Smith taught that “Mormonism is truth. … The first and fundamental principle of our holy religion is, that we believe that we have a right to embrace all, and every item of truth, without limitation or … being … prohibited by the creeds or superstitious notions of men.”

Yes, we do have the fulness of the everlasting gospel, but that does not mean that we know everything. In fact, one principle of the restored gospel is our belief that God “will yet reveal many great and important things.”

... So we continually seek truth from all good books and other wholesome sources. “If there is anything virtuous, lovely, or of good report or praiseworthy, we seek after these things.” In this manner we can resist the deceit of the evil one. In this manner we learn the truth “precept upon precept; line upon line.” And we will learn that intelligence cleaves unto intelligence, and wisdom receives wisdom, and truth embraces truth."

Elder Uchtdorf

http://www.lds.org/broadcasts/article/ces-devotionals/2013/01/what-is-truth?lang=eng

“The inquiry is frequently made of me, 'Wherein do you differ from others in your religious views?' In reality and essence we do not differ so far in our religious views, but that we could all drink into one principle of love. One of the grand fundamental principles of ‘Mormonism’ is to receive truth, let it come from whence it may.” 

Joseph Smith, quoted in History of the Church of Jesus Christ of Latter-day Saints, 2nded. 

(Salt Lake City: Deseret News Press, 1949), 5:499.

http://www.mormonnewsroom.org/article/authority-in-the-church

It is not enough just to live, just to survive. It is incumbent on each of us to equip ourselves to do something worthwhile in society – to acquire more and more light, so that our personal light can help illuminate the darkened world.

Gordon B. Hinkley
Standing for Something, p.67

"Seventy years ago this Church was organized with six members. We commenced, so to speak, as an infant. We had our prejudices to combat. Our ignorance troubled us in regard to what the Lord intended to do and what He wanted us to do … We advanced to boyhood, and still we undoubtedly made some mistakes, which … generally arise from a …lack of experience. We understand very well, when we reflect back upon our own lives, that we did many foolish things when we were boys … Yet as we advanced, the experience of the past materially assisted us to avoid such mistakes as we had made in our boyhood. It has been so with the Church. Our errors have generally arisen from a lack of comprehending what the Lord required of us to do. But now we are pretty well along to manhood … When we examine ourselves, however, we discover that we are still not doing exactly as we ought to do, notwithstanding all our experience. We discern that there are things which we fail to do that the Lord expects us to perform, some of which He requires us to do in our boyhood. … While we congratulate ourselves in this direction, we certainly ought to feel that we have not yet arrived at perfection. There are many things for us to do yet.”

Lorenzo Snow
6 April, 1900

Also quoted by Bishop John H. Vandenberg in 1963:
http://scriptures.byu.edu/gettalk.php?ID=1256

“We have come not to take away from you the truth and virtue you possess. We have come not to find fault with you nor to criticize you. We have not come here to berate you. … Keep all the good that you have, and let us bring to you more good.” 

President George Albert Smith 

Quoted in Sharing the Gospel with Others, comp. Preston Nibley (Salt Lake City: Deseret News Press, 1948), 12-13; italics added.
http://www.mormonnewsroom.org/article/authority-in-the-church

“Now all of that is behind me.’ No, there is much more ahead than there is behind. We live in a world where knowledge is developing at an ever-accelerating rate. Drink deeply from this ever-springing well of wisdom and human experience. If you should stop now, you will only stunt your intellectual and spiritual growth. Keep everlastingly at it. Read. Read. Read. Read the word of God in sacred books of scripture. Read from the great literature of the ages. Read what is being said in our day and time and what will be said in the future.”

Gordon B. Hinkley
BYU Commencement Address, April 27, 1995
Quoted by by James D. Gordon in March 2013: http://speeches.byu.edu/?act=viewitem&id=2110

“The brethren direct me to say that the Church has never announced a definite doctrine upon this point. Some of the brethren have held the view that it was possible in the course of progression to advance from one glory to another, invoking the principle of eternal progression; others of the brethren have taken the opposite view. But as stated, the Church has never announced a definite doctrine on this point.”
Secretary to the First Presidency in a 1952 letter; and again in 1965
(No online official source)

"One of the grand fundamental principles of Mormonism is to receive truth, let it come from where it may."

Joseph Smith, 
History of the Church, 5:499
http://www.lds.org/ldsorg/v/index.jsp?hideNav=1&locale=180&sourceId=4e9182066bda7110VgnVCM100000176f620a____&vgnextoid=2354fccf2b7db010VgnVCM1000004d82620aRCRD

"I want to say to my friends that we believe in all good. If you can find a truth in heaven, earth or hell, it belongs to our doctrine. We believe it; it is ours; we claim it...
[The gospel] embraces all morality, all virtue, all light, all intelligence, all greatness, and all goodness."

Brigham Young

Teachings of the Presidents: Brigham Young (Chapter 2)
http://www.lds.org/manual/teachings-brigham-young/chapter-2?lang=eng

"Although I was going to say I am not a Universalist, but I am, and I am also a Presbyterian, and a Roman Catholic, and a Methodist, in short, I believe in every true principle that is imbibed by any person or sect, and reject the false. If there is any truth in heaven, earth, or hell, I want to embrace it, I care not what shape it comes in to me, who brings it, or who believes in it, whether it is popular or unpopular. Truth, eternal truth, I wish to float in and enjoy."

-- John Taylor, "Motives and Feelings of the Saints, etc." (Journal of Discourses 1:155)

http://en.fairmormon.org/Journal_of_Discourses/1/25

“We have been blessed with much knowledge by revelation from God which, in some part, the world lacks. But there is an incomprehensibly greater part of truth which we must yet discover. Our revealed truth should leave us stricken with the knowledge of how little we really know. It should never lead to an emotional arrogance based upon a false assumption that we somehow have all the answers–that we in fact have a corner on truth, for we do not.”

Hugh B. Brown, “An Eternal Quest – Freedom of the Mind,” speech given to the BYU student body on May 13, 1969
http://president.byu.edu/documents/brown.htm

"...study and learn, and become acquainted with all good books, and with languages, tongues, and people."
D&C 90:15

http://www.lds.org/scriptures/dc-testament/dc/90?lang=eng

"We should gather all the good and true principles in the world and treasure them up, or we shall not come out true Mormons." 

Teachings of the Prophet Joseph Smith, p. 316
http://www.lds.org/church/news/print/viewpoint-embrace-honor-and-carry-forth-truth?lang=eng

It is not the function of religion to answer all the questions about God’s moral government of the universe, but to give one courage, through faith, to go on in the face of questions he never finds the answer to in his present status.

Harold B. Lee

http://www.lds.org/manual/teachings-harold-b-lee/chapter-23?lang=eng

“I have tried for a number of years to get the minds of the Saints prepared to receive the things of God; but we frequently see some of them, after suffering all they have for the work of God, will fly to pieces like glass as soon as anything comes that is contrary to their traditions.”

Joseph Smith, Teachings of the Prophet Joseph Smith, p. 331