'Weak' in the Bible

For his letters, say they, are weighty and powerful; but his bodily presence is weak, and his speech contemptible.

I speak as concerning reproach, as though we had been weak. Howbeit whereinsoever any is bold, (I speak foolishly,) I am bold also.

Who is weak, and I am not weak? who is offended, and I burn not?

Therefore I take pleasure in infirmities, in reproaches, in necessities, in persecutions, in distresses for Christ's sake: for when I am weak, then am I strong.

Since ye seek a proof of Christ speaking in me, which to you-ward is not weak, but is mighty in you.

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.

For we are glad, when we are weak, and ye are strong: and this also we wish, even your perfection.