If you once admit that all that is most wonderful in the actions of beasts, may be done by means of a material soul; will you not soon grant what follows, and say, that all that passes in man may be also done by a material soul? ... If you once grant that beasts, without any spiritual soul, are capable of thinking, of acting for an end, of foreseeing things to come, of remembering what is past, of acquiring experience by the particular reflection they make upon it; why will you not grant that men are capable of exercising their functions without any spiritual soul?