Click on the phrases to see them in context. The original texts by Immanuel Kant and David Hume are available from the Gutenberg Projet.

For he cannot pretend to any certainty of the non-existence of God and of a future life, unless- since it could only be proved by mere reason, and therefore apodeictically--he is prepared to establish the impossibility of both, which certainly no reasonable man would undertake to do.