At some point you have to realize the devil will no longer tempt you with bad stuffs, I mean you will be tempted with really good stuff. 

Not good stuff used to mask bad stuff. Really good stuff.

For example, you could be working on the cure of cancer then devil will whisper to you the idea of working on cure for aids, both are really good things to do, but the problem is, when you start working on cure for aids, another idea will jump in that you can work on cure for heart diseases.. and that’s how you will get nothing done.