3 Bible Verses about Hard Labor

Know ye not, that they who run in the race, all run, but one receiveth the prize? so run that ye may obtain. And every one that contendeth, is temperate in all things: and they indeed, to obtain a corruptible crown, but we an incorruptible. I therefore so run, not as uncertainly; I so fight, not as one that beateth the air.read more.
But I keep under my body, and bring it into subjection, lest by any means, after having preached to others, I myself should become a reprobate.

Ye have not yet resisted unto blood, striving against sin.

If by any means I may attain unto the resurrection of the dead. Not that I have already attained, or am already perfected: but I pursue, if I may apprehend that, for which I was also apprehended by Christ Jesus. Brethren, I do not account myself to have apprehended.read more.
But one thing I do, forgetting the things that are behind, and reaching forth unto the things which are before, I press toward the mark for the prize of the high calling of God in Christ Jesus.