When a parliamentary or social majority decrees that it is legal, at least under certain conditions, to kill unborn human life, is it not really making a “tyrannical” decision with regard to the weakest and most defenseless of human beings? … In the case of an intrinsically unjust law, such as a law permitting abortion or euthanasia, it is terefore never licit to obey it, or to take part in a a propaganda campaign in favour of such a law, or vote for it…. The moral gravity of procured abortion is apparent in all its truth if we recognize we are dealing with murder.

-John Paul II, The Gospel of Life