A thing is impossible when it is composed of two ideas so antagonistic, that we can not think of them at the same time. Evidence can be relied on only when confirmed by the constant testimony of our senses, which alone give birth to ideas, and enable us to judge of their conformity or of their incompatibility. That which exists necessarily, is that of which the non-existence would imply contradiction. These principles, universally recognized, are at fault when the question of the existence of God is considered; what has been said of Him is either unintelligible or perfectly contradictory; and for this reason must appear impossible to every man of common sense.