2 Corinthians 4:18
While we look not at the things which are seen, but at the things which are not seen: for the things which are seen aretemporal; but the things which are not seen are eternal.
It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
1 Timothy 4 8For bodily exercise profiteth little: but godliness is profitable unto all things, having promise of the life that now is, and of that which is to come. 9This is a faithful saying and worthy of all acceptation. 10For therefore we both labour and suffer reproach, because we trust in the living God, who is the Saviour of all men, specially of those that believe.
1 Corinthians 9
24Know ye not that they which run in a race run all, but one receiveth the prize? So run, that ye may obtain. 25And every man that striveth for the mastery is temperate in all things. Now they do it to obtain a corruptible crown; but we an incorruptible. 26I therefore so run, not as uncertainly; so fight I, not as one that beateth the air: 27But 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.