For Judaism has never thought that God's hottest dream was that everyone become a Jew.
-- Krister Stendahl, here
Woe unto you, scribes and Pharisees, hypocrites! for ye compass sea and land to make one proselyte, and when he is made, ye make him twofold more the child of hell than yourselves.
-- Matthew 23:15
For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh: But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God.
-- Romans 2:28f.
Know ye therefore that they which are of faith, the same are the children of Abraham.
-- Galatians 3:7