'Sufficient' in the Bible

Sufficient to such a one is this punishment which was inflicted by the many;

to the one a savor from death unto death; to the other a savor from life unto life. And who is sufficient for these things?

not that we are sufficient of ourselves, to account anything as from ourselves; but our sufficiency is from God;

who also made us sufficient as ministers of a new covenant; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.

And he hath said unto me, My grace is sufficient for thee: for my power is made perfect in weakness. Most gladly therefore will I rather glory in my weaknesses, that the power of Christ may rest upon me.