Philippians 2:12 KJV
12
Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling.
Mark 8:36-37 KJV
36
For what shall it profit a man, if he shall gain the whole world, and lose his own soul?
37
Or what shall a man give in exchange for his soul?
1 Corinthians 9:26-27 KJV
26
I therefore so run, not as uncertainly; so fight I, not as one that beateth the air:
27
But I keep under my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be a castaway.