sed castigo corpus meum, et in servitutem redigo: ne forte cum aliis prædicaverim, ipse reprobus efficiar.
But I chastise my body and bring it into subjection: lest perhaps, when I have preached to others, I myself should become a castaway.
Sed castiga corpore meo, et in servitute redige: ne forte cum alio praedica, ipso reprobo efficie.