Mysteries of God

Alma 12:9-10

And now Alma began to expound these things unto him, saying: 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 the 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.

I love in verse 9 Alma explains that there are those who know the mysteries of God but they are under strict command not to discuss their experiences unless moved to do so my the Holy Spirit. They are only to share that which the Lord commands in order to help another. Boyd K. Packer says,
"There are some things just too sacred to discuss: not secret, but sacred; not to be discussed, but to be harbored and protected and regarded with the deepest of reverence. There are many difficult questions, including some that we will not be able to answer, and many things are to be taken on faith....I have come to believe also that it is not wise to continually talk of unusual spiritual experiences. They are to be guarded with care and shared only when the Spirit itself prompts us to use them to the blessing of others... I heard President Romney once counsel mission presidents and their wives in Geneva. "I do not tell all I know. I have never told my wife all I know, for I found out that if I talked too lightly of sacred things, thereafter the Lord would not trust me." Ensign, Jan 1983, 53)

In verse 10 Alma tells us how we each can have our own sacred spiritual experiences and eventually know the mysteries of God. By softening our hearts and being teachable and faithful in all things we will learn a little bit at a time until we eventually know all the Lord has to teach us. Once we have gained our personal knowledge we must hold it sacred and use that knowledge under the direction of the Holy Ghost.