A classic work of religious philosophy, Dialogues Concerning Natural Religion is Scottish philosopher David Hume's famous examination of the nature of God. Hume asks the question as to whether or not man's belief in God can be supported by experience. The subject is discussed between three philosophers named Demea, Philo and Cleanthes. While all three agree that a god exists, they differ sharply in opinion on God's nature and how, or if, humankind can come to knowledge of a deity.