Where do we find God's will?

If we are to align our will with the will of God, how are we to know Gods will? So far, we only have the word of other men who claim to speak for God. But these men are fallible and therefore we can't assume everything they ever say is straight from God's mind.

So where is the line where Gods word ends and man's word begins? Is it really up to each individual to determine which conference talks and what lessons are the Word of God, and which ones are merely the words and opinions of men? If I pray about a talk or principle, and I receive an answer that it is just the opinion of a man, is that an acceptable conclusion?

Do I really have the option to determine, through prayer and spiritual confirmation, what applies to me and what I can disregard? Is this approach really compatible with church doctrine? If not, then that means members are required to follow every directive handed down from the Brethren, regardless of how the individual feels about the matter. If you take the church at its word, then the one-size-fits-all directions from the Brethren really must be applied to every individual, regardless of personal circumstances or tastes.

And you are then also required to follow every directive from the Brethren, even if they happen to be speaking as men.