“Righteousness must be fruit, the organic product of the life and character, exponential of what is within, Matt. 7:16, 20; 21:43.” (Geerhardus Vos, The Kingdom of God and the Church, p. 62).
“[N]othing is more difficult than to counterfeit virtue.” (John Calvin, Commentary on the Gospels).
“Those who want to enter the kingdom must. . . return to the Father with a confession of sin (Luke 15:18), and go through the narrow gate and walk down the narrow path (Matt. 7:14). Those who really do this are enabled to do so b y God himself. For human beings are by nature evil (7:11). Out of their hearts come nothing but wickedness (15:19). Like a bad tree, they cannot produce good fruit (7:17ff.). Accordingly, if there is to be good fruit, the tree must be made good first, something only God can do (19:26).” (Herman Bavinck, Reformed Dogmatics, Vol. 4, p. 47).
Quotes from the Reflection for Trinity Presbyterian Church