Truly, I endured [opposition] patiently, while showing evidence of being an apostle among you. I performed [supernatural] signs, and wonders and powerful miracles.

since you are looking for proof that Christ is speaking through me. Christ is not weak in His dealing with you, but is powerful among you. [Note: Paul probably refers to the positive effects of his ministry there in Corinth].

For we are glad when we are weak and you are powerful. And we are also praying for your complete restoration [i.e., to spiritual maturity].