'Considers' in the Bible

One person considers one day to be above another day. Someone else considers every day to be the same. Each one must be fully convinced in his own mind.

(I know and am persuaded by the Lord Jesus that nothing is unclean in itself. Still, to someone who considers a thing to be unclean, to that one it is unclean.)

For if anyone considers himself to be something when he is nothing, he deceives himself.