Bible Verses About Warfare of Saints: With self-denial

And every one that striveth for the mastery refraineth himself from all things. And they indeed that they may receive a corruptible crown: but we an incorruptible one.

I therefore so run, not as at an uncertainty: I so fight, not as one beating the air.

But I chastise my body and bring it into subjection: lest perhaps, when I have preached to others, I myself should become a castaway.