For behold, thus saith the Lord God: I will give unto the children of men line upon line, precept upon precept, here a little and there a little; and blessed are those who hearken unto my precepts, and lend an ear unto my counsel, for they shall learn wisdom; for unto him that receiveth I will give more; and from them that shall say, We have enough, from them shall be taken away even that which they have -- 2 Nephi 28
Whether understanding/feelings/impressions come from Holy Ghost or just my own crzy brain is tough to know. Learning to use intuition as an epistemology is not easy. It takes alot of spiritual practice. You also have to be able to do the simple basics of being civil first. You need to really know how to use logic, appeal to authority, obey, pray, meditate, read, listen, learn, before you can really know the difference between yourself and God.
sometimes i wonder if it is because you become less and less distinguishable. i don't have to quote the bible when the words feel like they are my own do i? only for emphasis?
Even on 9/11 Elder Bednar still spoke to the students of BYU, and this is one of the most important parts of his talk:
I will say, the process of discerning between our will and God’s will becomes less and less of a concern as time goes by and as we strive to rid ourselves of worldliness—and thereby cultivate the spirit of revelation in our lives. That is, as we mature spiritually, we begin to develop sound judgment, a refined and educated conscience, and a heart and mind filled with wisdom. We become ruled by love rather than fear when the love of God floods our hearts with safety and peace.
It is not just that we have grown older, nor have we simply become smarter and had more experiences on which to draw, as important as those experiences are. Rather, the Holy Ghost has over time been expanding our intellect, forming our feelings, sharpening and elevating our perspective, such that we increasingly think and feel and act as the Lord would under similar circumstances. In short, we have made steady progress in obtaining “the mind of Christ” (1 Corinthians 2:16).