'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.

For by the grace [of God] given to me I say to everyone of you not to think more highly of himself [and of his importance and ability] than he ought to think; but to think so as to have sound judgment, as God has apportioned to each a degree of faith [and a purpose designed for service].

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.

Accept anyone who is weak in faith, but not for the purpose of arguing over differences of opinion.

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.