And then at last He for His part lays His hand upon them, saying, "According to your faith be it unto you." And this He does to confirm their faith, and to show that they are participators in the good work ...
-St. John Chrysostom, Homily 32 on Matthew 9, 4th Century


He delivered them first from their want of faith. The affliction of the dumb man was not natural ... wherefore also he needs others to bring him. ... For this cause neither does He require faith of him, but straightway heals the disease.
-St. John Chrysostom, Homily 32 on Matthew 9, 4th Century