John Calvin on Sola fide

“Let it be a fixed principle in our hearts, that the kingdom of heaven is not the hire of servants, but the inheritance of sons.”

“The error of our opponents lies chiefly in this, that they think James is defining the mode of justification, whereas his only object is to destroy the depraved security of those who vainly pretended faith as an excuse for their contempt of good works.”

“Those who are justified by true faith prove their justification by obedience and good works, not by a bare and imaginary semblance of faith. [James] is not discussing the mode of justification, but requiring that the justification of believers shall be operative.”