Moses 5

Even from the very beginning with Adam and Eve, we learn the pattern of revelation and receiving knowledge.  After having been driven out of the Garden -

"...Adam and Eve, his wife, called upon the name of the Lord, and they heard the voice of the Lord from the way toward the Garden of Eden, speaking unto them, and they saw him not; for they were shut out from his presence.
5 And he gave unto them commandments, that they should worship the Lord their God, and should offer the firstlings of their flocks, for an offering unto the Lord. And Adam was obedient unto the commandments of the Lord."  (Pearl of Great Price | Moses 5:4 - 5)

It is important to understand that the Lord gave Adam and Eve commandments and they chose, by faith, to be obedient.  After having demonstrated faith and obedience -

"...after many days an angel of the Lord appeared unto Adam, saying: Why dost thou offer sacrifices unto the Lord? And Adam said unto him: I know not, save the Lord commanded me.
7 And then the angel spake, saying: This thing is a similitude of the sacrifice of the Only Begotten of the Father, which is full of grace and truth.
8 Wherefore, thou shalt do all that thou doest in the name of the Son, and thou shalt repent and call upon God in the name of the Son forevermore.
9 And in that day the Holy Ghost fell upon Adam, which beareth record of the Father and the Son, saying: I am the Only Begotten of the Father from the beginning, henceforth and forever, that as thou hast fallen thou mayest be redeemed, and all mankind, even as many as will."  (Pearl of Great Price | Moses 5:6 - 9)

It was by faith and obedience that Adam and Eve received further knowledge.  Upon receiving further knowledge -

"...in that day Adam blessed God and was filled, and began to prophesy concerning all the families of the earth, saying: Blessed be the name of God, for because of my transgression my eyes are opened, and in this life I shall have joy, and again in the flesh I shall see God.
11 And Eve, his wife, heard all these things and was glad, saying: Were it not for our transgression we never should have had seed, and never should have known good and evil, and the joy of our redemption, and the eternal life which God giveth unto all the obedient.
12 And Adam and Eve blessed the name of God, and they made all things known unto their sons and their daughters."  (Pearl of Great Price | Moses 5:10 - 12)

This is the pattern and process by which we continue to receive knowledge and testimonies...only upon faith and obedience first.