[63] this is what he intends to imply by an enigmatical expression when he says that the man who was endowed by nature with a good disposition had two sons, twins: for every man has at the beginning simultaneously with his birth, a soul which is pregnant with twins, namely, good and evil, bearing the impression of both of them: but when it receives the blessed and happy part, then by the force of one single attraction it inclines to the good, never once leaning towards the other side, and never even wavering so as to appear to be balancing between the two.