"They deceive themselves who believe that union with God consists in ecstasies or raptures, and in the enjoyment of Him. For it consists in nothing except the surrender and subjection of our will - with our thoughts, words and actions - to the will of God."

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The fact that people have religious experiences is interesting from the psychological point of view, but it does not in any way imply that there is such a thing as religious knowledge...Unless he can formulate this 'knowledge' in propositions that are empirically verifiable, we may be sure that he is deceiving himself.

— A.J. Ayer