A thing is impossible, when it includes two ideas that mutually destroy one another, and which can neither be conceived nor united in thought. Conviction can be founded only upon the constant testimony of our senses, which alone give birth to our ideas, and enable us to judge of their agreement or disagreement. That, which exists necessarily, is that, whose non-existence implies a contradiction. These principles, universally acknowledged, become erroneous, when applied to the existence of a God. Whatever has been hitherto said upon the subject, is either unintelligible, or perfect contradiction, and must therefore appear absurd to every rational man.