2 Corinthians 12:19
Again, think ye that we excuse ourselves unto you? we speak before God in Christ: but we do all things, dearly beloved, for your edifying.
2 Corinthians 12:20
For I fear, lest, when I come, I shall not find you such as I would, and that I shall be found unto you such as ye would not: lest there be debates, envyings, wraths, strifes, backbitings, whisperings, swellings, tumults:
2 Corinthians 13:4
For though he was crucified through weakness, yet he liveth by the power of God. For we also are weak in him, but we shall live with him by the power of God toward you.
2 Corinthians 13:9
For we are glad, when we are weak, and ye are strong: and this also we wish, even your perfection.