““On Religion and Science: "You cannot answer Berkeley, even if you have annihilated Kant, and yet, perforce, you assume that Berkeley is wrong when you affirm that science proves the non-existence of God, or, as much to the point, the existence of matter–You know I granted the reality of matter only in order to make myself intelligible to your understanding. Be positive scientists, if you please; but ontology has no place in positive science, so leave it alone....””