To refuse to take part in committing an injustice is not only a moral duty; it is also a basic human right. Were this not so, the human person would be forced to perform an action intrinsically incompatible with human dignity, and in this way human freedom itself, the authentic meaning and purpose of which are found in its orientation to the true and the good, would be radically compromised. What is at stake therefore is an essential right which, precisely as such, should be acknowledged and protected