I love the ministry of John Piper. Whenever I need a little charge to get me going, I listen to him, watch Him preach, or read a book he has written. It is not that he is anything special. But his passion for Jesus oozes out of every part of him. That excites me. His calling is that of joy and passion in the pursuit of Jesus. And with that comes warnings to say no to sin. I found this short video helpful, maybe you will as well.