The challenge; well, one of them, anyway.
We Catholics have not only to do our best to keep down our own warring passions and live decent lives, which will often be hard enough in this odd world we have been born into. We have to bear witness to moral principles which the world owned yesterday and has begun to turn its back on to-day. We have to disapprove of some of the things our neighbours do, without being stuffy about it; we have to be charitable towards our neighbours and make great allowances for them, without falling into the mistake of condoning their standards and so encouraging them in sin.
- Ronald Knox, from "In Soft Garments"