Knowledge is a key of salvation
"A man is saved no faster than he gets knowledge, for if he does not get knowledge, he will be brought into captivity by some evil power in the other world, as evil spirits will have more knowledge, and consequently more power than many men who are on the earth. Hence it needs revelation to assist us, and give us knowledge of the things of God." (Joseph Smith, HC 4:34)
We must search the mysteries
"I advise all to go on to perfection, and search deeper and deeper into the mysteries of Godliness." (Joseph Smith, HC 6:17)
We must seek to know the mysteries in full, otherwise we will be damned to hell
"It is given unto many to know the mysteries of God; nevertheless they are laid under a strict command that they shall not impart only according to the portion of his word which he doth grant unto the children of men, according to the heed and diligence which they give unto him. And therefore, he that will harden his heart, the same receiveth the lesser portion of the word; and he that will not harden his heart, to him is given the greater portion of the word, until it is given unto him to know the mysteries of God until he know them in full. And they that will harden their hearts, to them is given the lesser portion of the word until they know nothing concerning his mysteries; and then they are taken captive by the devil, and led by his will down to destruction. Now this is what is meant by the chains of hell." (Alma, Alma 12:10-11)
"For every one that useth milk is unskilful in the word of righteousness: for he is a babe. But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil." (Heb 5:13-14)
"Whom shall he teach knowledge? and whom shall he make to understand doctrine? them that are weaned from the milk, and drawn from the breasts." (Isaiah 28:9)
"And thine ears shall hear a word behind thee, saying, This is the way, walk ye in it, when ye turn to the right hand, and when ye turn to the left." (Isaiah 30:21)
From where do we obtain meat? What is our authority?
"And it came to pass that I, Nephi, being exceedingly young, nevertheless being large in stature, and also having great desires to know of the mysteries of God, wherefore, I did cry unto the Lord; and behold he did visit me, and did soften my heart that I did believe all the words which had been spoken by my father; wherefore, I did not rebel against him like unto my brothers." (1 Nephi 2:16)
"For he that diligently seeketh shall find; and the mysteries of God shall be unfolded unto them, by the power of the Holy Ghost, as well in these times as in times of old, and as well in times of old as in times to come; wherefore, the course of the Lord is one eternal round." (1 Nephi 10:19)
"And he also taught them concerning the records which were engraven on the plates of brass, saying: My sons, I would that ye should remember that were it not for these plates, which contain these records and these commandments, we must have suffered in ignorance, even at this present time, not knowing the mysteries of God....
"I say unto you, my sons, were it not for these things, which have been kept and preserved by the hand of God, that we might read and understand of his mysteries, and have his commandments always before our eyes, that even our fathers would have dwindled in unbelief, and we should have been like unto our brethren, the Lamanites, who know nothing concerning these things, or even do not believe them when they are taught them, because of the traditions of their fathers, which are not correct." (King Benjamin, Mosiah 1:3, 5)
"Yea, he that repenteth and exerciseth faith, and bringeth forth good works, and prayeth continually without ceasing—unto such it is given to know the mysteries of God; yea, unto such it shall be given to reveal things which never have been revealed; yea, and it shall be given unto such to bring thousands of souls to repentance, even as it has been given unto us to bring these our brethren to repentance." (Ammon, Alma 26:22)
"Knowledge saves a man; and in the world of spirits no man can be exalted but by knowledge. So long as a man will not give heed to the commandments, he must abide without salvation. If a man has knowledge, he can be saved; although, if he has been guilty of great sins, he will be punished for them. But when he consents to obey the gospel, whether here or in the world of spirits, he is saved." (Joseph Smith, HC 14:15 p. 314)
"And to [the faithful] will I reveal all mysteries, yea, all the hidden mysteries of my kingdom from days of old, and for ages to come, will I make known unto them the good pleasure of my will concerning all things pertaining to my kingdom. Yea, even the wonders of eternity shall they know, and things to come will I show them, even the things of many generations. And their wisdom shall be great, and their understanding reach to heaven; and before them the wisdom of the wise shall perish, and the understanding of the prudent shall come to naught. For by my Spirit will I enlighten them, and by my power will I make known unto them the secrets of my will—yea, even those things which eye has not seen, nor ear heard, nor yet entered into the heart of man." (D&C 76:7-10)
“I met with the twelve at Brother Joseph’s. He conversed with us in a familiar manner on a variety of subjects, and explained to us the Urim and Thummim which he found with the plates, called in the Book of Mormon the Interpreters. He said that every man who lived on the earth was entitled to a seer stone, and should have one, but they are kept from them in consequence of their wickedness, and most of those who do find one make an evil use of it, he showed us his seer stone.” (Brigham Young, Mill. Star v. 26, no. 8, p. 118)
"Mormonism is truth; and every man who embraces it feels himself at liberty to embrace every truth. Consequently the shackles of superstition, bigotry, ignorance, and priestcraft, fall at once from his neck; and his eyes are opened to see the truth, and truth greatly prevails over priestcraft…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 without being circumscribed or prohibited by the creeds or superstitious notions of men, or by the dominations of one another, when that truth is clearly demonstrated to our minds, and we have the highest degree of evidence of the same." (Joseph Smith, Teachings of Presidents of the Church: Joseph Smith, page 264)
We have had generations of yes-men leadership in the church who defer and suspend all of their own judgement to the authority just higher than themselves, up to the president, that we now have presidents who really have no idea what's going on who were groomed in those ranks. Alma 12:9-11 is fulfilled in them.
What can be comprehended, taught, understood about the Gospel is truly endless. If we are struggling to find something to teach or preach and be inspired about then we have only barely scratched the surface of just what Joseph taught. Should we arrive at the point where we have open vision, there will be yet more that will give context to what we say and give us yet more to preach, even if we are forbidden from revealing what was revealed to us. So difficult is it for the purity of the Gospel, the mysteries and the knowledge of the blessings that await, to penetrate our clouded mortal minds and overcome our traditions, that we should never be wanting for truth, and if so, then our own performance is wanting.
"Woe unto you, lawyers! for ye have taken away the key of knowledge: ye entered not in yourselves, and them that were entering in ye hindered." (Luke 11:52)
"Remember that without faith you can do nothing; therefore ask in faith. Trifle not with these things; do not ask for that which you ought not. Ask that you may know the mysteries of God, and that you may translate and receive knowledge from all those ancient records which have been hid up, that are sacred; and according to your faith shall it be done unto you." (D&C 8:10-11)
"Truly it may be said of us: Never have so many done so little with so much. In our desperate attempt to purchase the praise of the world, we have sold our tokens for money, our birthright for a mess of pottage." (Paul Toscano, Sanctity of Dissent)
"God hides most things in plain sight. It is up to you, therefore, to be willing to draw back the veil and see them." (The Second Comforter, Sayings)
“Knowledge is necessary to life and godliness. Woe unto you priests and divines who preach that knowledge is not necessary unto life and salvation. Take away Apostles, etc., take away knowledge, and you will find yourselves worthy of the damnation of hell. Knowledge is revelation. Hear, all ye brethren, this grand key: knowledge is the power of God unto salvation.” (Quoted by Martha Jane Knowlton Coray, reporting a discourse given by Joseph Smith on May 21, 1843, in Nauvoo, Illinois; Martha Jane Knowlton Coray, Notebook, Church Archives; emphasis mine)