To be pure in heart is to take no delight in cunning, but converse sincerely with men, and express nothing, by word or look, which is not felt in the heart.
John CalvinNow we shall possess a right definition of faith if we call it a firm and certain knowledge of God's benevolence toward us, founded upon the truth of the freely given promise in Christ, both revealed to our minds and sealed upon our hearts through the Holy Spirit.
John CalvinFor, since the fall of Adam had brought disgrace upon all his posterity, God restores those, whom He separates as His own, so that their condition may be better than that of all other nations. At the same time it must be remarked, that this grace of renewal is effaced in many who have afterwards profaned it
John Calvin