One of my favorite scriptures in the Doctrine and Covenants is D&C 6:36. The Lord is speaking to Joseph Smith and Oliver Cowdery:

"Look unto me in every thought; doubt not, fear not."

I really believe that Satan loves when we are afraid, because our fears paralyze us and then we don't progress--and then he doesn't have to even do anything to make us "bad." We're just damning ourselves, stopping our own progression. I've been conscious of this the past several months. I've been making an active effort to overcome my fears and trust in what the Lord wants me to do and what He has in store for me.