The Enarrations, or Expositions, on the Psalms

^4. Wherefore, most beloved, as each can, make vows, and perform to the Lord God what each can: let no one look back, no one delight himself with his former interests, no one turn away from that which is before to that which is behind: let him run until he arrive: for we run not with the feet but with the desire. But let no one in this life say that he has arrived. For who can be so perfect as Paul? Yet he says, “Brethren, I count not myself to have attained.”