Charles Spurgeon Commentary Philippians 3:12-13

"Not that I have already obtained, or am already made perfect: but I press on, if so be that I may lay hold on that for which also I was laid hold on by Christ Jesus. Brethren, I could not myself yet to have laid hold: but one thing [I do], forgetting the things which are behind, and stretching forward to the things which are before," — Philippians 3:12-13 (ASV)

Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus. Brethren, I count not myself to have apprehended:

He did count himself as saved; he knew that he was Christ's; but he did not count himself as having realized all that Christ meant to do for him and by him. He did not reckon that he had reached as far as he could reach, or learned all that he could learn, or done all that he could do.