John Calvin Commentary Matthew 9:29

"Then touched he their eyes, saying, According to your faith be it done unto you." — Matthew 9:29 (ASV)

According to your faith. Though the subject of the narrative is a remarkable benefit conferred on two blind men, yet from this declaration of Christ we may draw the general doctrine, that if we pray in faith, we will never be refused in our prayers. But if those two men, whose faith was small and imperfectly formed, obtained what they wished, much more efficacious will now be the faith of those who, endowed with the Spirit of adoption, and relying on the sacrifice of Christ, shall approach to God.