'Weak' in the Bible

For, "His letters," they say, "are weighty and strong, but his bodily presence is weak, and his speech is despised."

I speak by way of disparagement, as though we had been weak. Yet however any is bold (I speak in foolishness), I am bold also.

Who is weak, and I am not weak? Who is caused to stumble, and I don't burn with indignation?

Therefore I take pleasure in weaknesses, in injuries, in necessities, in persecutions, in distresses, for Christ's sake. For when I am weak, then am I strong.

seeing that you seek a proof of Christ who speaks in me; who toward you is not weak, but is powerful in you.

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

For we rejoice when we are weak and you are strong. And this we also pray for, even your perfecting.