'Ought' in the Bible

But what I meant was that you were not to associate with any one bearing the name of "brother," if he was addicted to fornication or avarice or idol-worship or abusive language or hard-drinking or greed of gain. With such a man you ought not even to eat.

If any one imagines that he already possesses any true knowledge, he has as yet attained to no knowledge of the kind to which he ought to have attained;

For a man ought not to have a veil on his head, since he is the image and glory of God; while woman is the glory of man.

That is why a woman ought to have on her head a symbol of subjection, because of the angels.