Theophylact of Bulgaria
With this boldness we shall certainly receive whatever we ask from Him. Why? Because we keep His commandments. The one who is asked is greatly inclined to listen by the obedient disposition of those who ask, provided that they ask without doubting. Since we keep His commandments and do what is pleasing before Him, we shall hope that our prayers will not be in vain. For when two persons are sincerely disposed toward one another, one usually acts at once for the benefit of the other. What commandment of His have we kept? The one that commands us to love one another (Jn 13:34).