This article by John Piper absolutely confirmed some things for me. Not just in relation to sexual lust, but just toward other things like worry and looking for confirmation in other people. It's fairly long, but definitely worth a read.
I've mentioned this to a lot of people lately, the thought that the times when we forget the simple promises that God has made to us or when we choose to not believe them are the times that our hearts get into trouble. It's definitely something that I wrestle with, and this article was a stern reminder of what's at stake.
