Because of the variety in the concurrence of the internal call with the outward one, hypocrites mingle among the true people of Israel within the visible Church (which is the gathering of those who have been called). It is with regard to this mixture that both the good and the evil are said to be invited to the wedding banquet of the Son, the Lamb of God (Matt 22:4), and that many are called, but few are chosen (Matt 20:16).

Synopsis of a Purer Theology, Vol. 1, 347.