9:22. To the weak I became weak, that I might gain the weak. I became all things to all men, that I might save all.
9:23. And I do all things for the gospel’s sake, that I may be made partaker thereof.
9:24. Know you not that they that run in the race, all run indeed, but one receiveth the prize. So run that you may obtain.
9:25. And every one that striveth for the mastery refraineth himself from all things. And they indeed that they may receive a corruptible crown: but we an incorruptible one.
9:26. I therefore so run, not as at an uncertainty: I so fight, not as one beating the air.
9:27. But I chastise my body and bring it into subjection: lest perhaps, when I have preached to others, I myself should become a castaway.
I chastise, etc.... Here St. Paul shews the necessity of self-denial and mortification, to subdue the flesh, and its inordinate desires.
1 Corinthians Chapter 10
By the example of the Israelites, he shews that we are not to build too much upon favours received but to avoid their sins and fly from the service of idols and from things offered to idols.
10:1. For I would not have you ignorant, brethren, that our fathers were all under the cloud: and all passed through the sea.