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.