The Lord commands us to do good unto all men without exception, though the majority are very undeserving when judged according to their own merits. But scripture here helps us out with an excellent argument when it teaches us that we must not think of man's real value, but only of his creation in the image of God to which we owe all possible honor and love.
John CalvinWhomever the Lord has adopted and deemed worthy of His fellowship ought to prepare themselves for a hard, toilsome, and unquiet life, crammed with very many and various kinds of evil.
John CalvinWithout knowledge of self there is no knowledge of God Our wisdom, in so far as it ought to be deemed true and solid Wisdom, consists almost entirely of two parts: the knowledge of God and of ourselves. But as these are connected together by many ties, it is not easy to determine which of the two precedes and gives birth to the other.
John Calvin