'Opinion' in the Bible

I am of the opinion that there is no comparison between the pain of this present time and the glory which we will see in the future.

But I say to every one of you, through the grace given to me, not to have an over-high opinion of himself, but to have wise thoughts, as God has given to every one a measure of faith.

Be in harmony with one another. Do not have a high opinion of yourselves, but be in agreement with common people. Do not give yourselves an air of wisdom.

Let not him who takes food have a low opinion of him who does not: and let not him who does not take food be a judge of him who does; for he has God's approval.

I am conscious of this, and am certain in the Lord Jesus, that nothing is unclean in itself; but for the man in whose opinion it is unclean, for him it is unclean.