To 'justify' means nothing else than to acquit of guilt him (her) who was accused as if his own innocence were confirmed.
John CalvinMen are indeed to be taught that the favour of God is offered, without exception, to all who ask it; but since those only begin to ask whom heaven by grace inspires, even this minute portion of praise must not be withheld from Him. It is the privilege of the elect to be regenerated by the Spirit of God, and then placed under His guidance and government.
John CalvinFor though we very truly hear that the kingdom of God will be filled with splendor, joy, happiness and glory, yet when these things are spoken of, they remain utterly remote from our perception, and as it were, wrapped in obscurities, until that day.
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