'Weaknesses' in the Bible

Of such a one I will boast, but of myself I will not boast, unless in my weaknesses.

And he said to me, My grace suffices thee; for my power is perfected in weakness. Most gladly therefore will I rather boast in my weaknesses, that the power of the Christ may dwell upon me.

Wherefore I take pleasure in weaknesses, in insults, in necessities, in persecutions, in straits, for Christ: for when I am weak, then I am powerful.