Bible Verses About Warfare of Saints: With self-denial

and every one who is striving, is in all things temperate; these, indeed, then, that a corruptible crown they may receive, but we an incorruptible;

I, therefore, thus run, not as uncertainly, thus I fight, as not beating air;

but I chastise my body, and bring it into servitude, lest by any means, having preached to others--I myself may become disapproved.