Bible Verses About Self-Denial: Danger of neglecting

For he that will save his life, shall lose it: and he that shall lose his life for my sake, shall find it.

For what doth it profit a man, if he gain the whole world and suffer the loss of his own soul? Or what exchange shall a man give for his soul?

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