Perpetual peace (n.) will be added unto you, if you seek first the kingdom of pure practical reason and its righteousness.
Perpetual peace (n.) was first a joke on a Dutch innkeeper's sign, painted above a churchyard: the only lasting peace is the grave's.
Perpetual peace (n.) is really an impracticable idea, but the political principles that approach it are not — duty demands the approximation.
Perpetual peace (n.) is no empty idea but a problem that gradually works out its own solution — every peace so far having been a mere cessation of hostilities.
Perpetual peace (n.) is something we must act as if could come about, even if it remains forever a pious hope — reason's irresistible veto: there shall be no war.