'Weak' in the Bible

but God chose the foolish things of the world that he might put to shame those who are wise. God chose the weak things of the world, that he might put to shame the things that are strong;

We are fools for Christ's sake, but you are wise in Christ. We are weak, but you are strong. You have honor, but we have dishonor.

However, that knowledge isn't in all men. But some, with consciousness of the idol until now, eat as of a thing sacrificed to an idol, and their conscience, being weak, is defiled.

But be careful that by no means does this liberty of yours become a stumbling block to the weak.

For if a man sees you who have knowledge sitting in an idol's temple, won't his conscience, if he is weak, be emboldened to eat things sacrificed to idols?

And through your knowledge, he who is weak perishes, the brother for whose sake Christ died.

Thus, sinning against the brothers, and wounding their conscience when it is weak, you sin against Christ.

To the weak I became as weak, that I might gain the weak. I have become all things to all men, that I may by all means save some.

For this cause many among you are weak and sickly, and not a few sleep.