2. Paul is speaking about his good self.
“Now I rejoice in my sufferings for you, and I fill up in my flesh what is lacking in regard to Christ's tribulations, for the sake of His body, which is the church.”
What can he mean? This scripture is completely ignored or convoluted into mush in most commentaries, because it seems to contradict what most of us have been taught about our faith.
Colossians 1:24

3. Matthew 5:17-18
“Do not think that I have come to abolish the Law or the Prophets;
I have not come to abolish them but to fulfill them. 
For truly, I say to you, until heaven and earth pass away, not an iota,
not a dot, will pass from the Law until all is accomplished.”

5. Paul said this at least 3x.
You are to imitate me, just as I imitate Christ. I Corinthians 11:1
Brethren, be followers together of me Philippians 3:7a
Therefore I urge you to imitate me. I Corinthians 4:16

6. One’s psychology is predicated upon one’s theology.

8. But even if we or an angel from heaven should preach a gospel contrary to the one we preached to you, let him be under a divine curse!
Galatians 1:8