Alma 29:1-3

O that I were an angel, and could have the wish of mine heart, that I might go forth and speak with the trump of God, with a voice to shake the earth, and cry repentance unto every people!
Yea, I would declare unto every soul, as with the voice of thunder, repentance and the plan of redemption, that they should repent and come unto our God, that there might not be more sorrow upon all the face of the earth.
But behold, I am a man, and do sin in my wish; for I ought to be content with the things which the Lord hath allotted unto me.

I really like the whole 29th chapter of Alma and the thought progression it shows. And I may do a separate post about that progression sometime. But when I read here this last week, there was something more that hit me in these first three verses.

Basically, no matter how good what you want may look, it is wrong if it goes against God's plan. I guess a sin is basically anything that leads you away from Him. And if your desires are not in line with His desires, then you are not drawing near unto Him.