Cross reference
Philippians 3:4
4 Even though I myself might have faith in the flesh: if any other man has reason to have faith in the flesh, I have more:
2 Corinthians 11:18-22
18 Seeing that there are those who take credit to themselves after the flesh, I will do the same.
19 For you put up with the foolish gladly, being wise yourselves.
20 You put up with a man if he makes servants of you, if he makes profit out of you, if he makes you prisoners, if he puts himself in a high place, if he gives you blows on the face.
21 I say this by way of shaming ourselves, as if we had been feeble. But if anyone puts himself forward (I am talking like a foolish person), I will do the same.
22 Are they Hebrews? so am I. Are they of Israel? so am I. Are they the seed of Abraham? so am I.