'Weak' in the Bible

For, His letters, they say, are weighty and strong; but his bodily presence is weak, and his speech of no account.

I speak by way of disparagement, as though we had been weak. Yet whereinsoever 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 burn not?

Wherefore 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 ye seek a proof of Christ that speaketh in me; who to you-ward is not weak, but is powerful in you:

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

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