 Many believers live under the power of legalistic thinking. They judge the security of their salvation based upon their own performance. Now, I am not saying nor do I believe that anyone can just go on sinning and living however they want. There will always be severe consequences to sin and compromise even in the life of the believer. Having said that, there are some believers who live so aware of sin that they view themselves as like a worm before God. And while this might seem spiritually virtuous, it's not. It's actually a subtle form of ego and pride because it's actually self-reliance upon your own works rather than the finished work of the cross. And it's religion. It's legalism. It's a works-based view of salvation.