'Weakness' in the Bible

If it is necessary to boast, I will boast [about] {the things related to my weakness}.

And he said to me, "My grace is sufficient for you, because the power is perfected in weakness." Therefore rather I will boast most gladly in my weaknesses, in order that the power of Christ may reside in me.

For indeed, he was crucified because of weakness, but he lives because of the power of God. For we also are weak in him, but we will live together with him because of the power of God toward you.