'Sufficient' in the Bible

Sufficient to such a man is this punishment, which was inflicted of many.

To the one we are the savour of death unto death; and to the other the savour of life unto life. And who is sufficient for these things?

Not that we are sufficient of ourselves to think any thing as of ourselves; but our sufficiency is of God;

who also made us sufficient to be ministrants of a new covenant, not of letter, but of spirit; for the letter doth kill, and the spirit doth make alive.

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