is social by nature and can live only among his fellow human beings. Whoever acknowledges only what he himself perceives through his senses cannot enlist their help in most of his affairs.

If they mean that whatever cannot be perceived by the senses does not exist, a sound response would be to tell them: “My God—glorified is He—can be perceived by the senses: He can be seen and His speech can be heard. He has spoken to some of His creatures in this world, and He will speak to His servants, and they will see Him in the Hereafter.”

If they deny that a person can know or acknowledge anything he does not perceive through his senses, it would be possible to establish for them the validity of knowledge derived from reports