The Apostle Paul
Philippians 3:13BSB·traditional attribution

Brothers, I do not consider myself yet to have taken hold of it. But one thing I do: Forgetting what is behind and straining toward what is ahead,

John Calvin Reformed @genevareformer

13 I reckon not myself to have as yet apprehended He does not here call in question the certainty of his salvation, as though he were still in suspense, but repeats what he had said before — that he still aimed at making farther progress, because he had not yet attained the end of his calling.

Matthew Henry Presbyterian @wholebiblehenry

We now heard what the apostle renounced; let us now see what he laid hold on, and resolved to cleave to, namely, Christ and heaven. He had his heart on these two great peculiarities of the Christian religion. I. The apostle had his heart upon Christ as his righteousness. This is illustrated in several instances. 1.

Commenting on Philippians 3:9-14

John Gill Reformed Baptist @doctorgill

I press toward the mark,.... The allusion is to the white line, or mark, which the runners in the Olympic games made up to, and to which he that came first received the prize; and by which the apostle intends the Lord Jesus Christ, who is "the scope", or "mark", of all the thoughts, purposes, and counsels of God, to which they all aim, and...