'Necessity' in the Bible

I suppose, therefore, this to be good because of the present necessity, that it is good for a man that the matter be thus: --

And he who hath stood stedfast in the heart -- not having necessity -- and hath authority over his own will, and this he hath determined in his heart -- to keep his own virgin -- doth well;

for if I may proclaim good news, it is no glorying for me, for necessity is laid upon me, and woe is to me if I may not proclaim good news;