Of all people, Paul had plenty of reasons to be full of confidence in his own heritage and achievements. But that is not where he puts his faith. In this passage, he lists out his accomplishments.
You can see the list in Philippians 3:4b-6:
Paul’s Jewish heritage and testimony were impeccable. His resume, so to speak, was spotless, and had all anyone could every wish for… from a worldly point of view. But Paul’s emphasis here is that our own achievements, or our own heritage, is not worth placing our trust in. There is something more.
And, if anyone had the right to place their trust in themselves, Paul did. In this passage, he lists seven characteristics of his life and accomplishments. The first four represent his birth and background. The final three represent his accomplishments.
Let’s look at each in turn: