Reason is not the ultimate test of truth nor is it the court of first
instance.
For example: A man questions his own existence; he applies first to the
court of mother-wit and is promptly told that he exists; he appeals next
to reason and, after some wrangling, is told that the matter is very
doubtful; he proceeds to the equity of that reasonable faith which
inspires and transcends reason, and the judgment of the court of first
instance is upheld while that of reason is reversed.
Nevertheless it is folly to appeal from reason to faith unless one is
pretty sure of a verdict and, in most cases about which we dispute
seriously, reason is as far as we need go.