He is quite idealistic and morally pure, which many other rats find puzzling.

What I would like to question though, is the assumption that activists are supposed to be morally pure.

To be chaste, from the Latin casta, "morally pure," is to deny all sexual intercourse.

So you can reap the benefits and remain morally pure at the same time.

All of these groups were devoted to the Bible and to being morally pure.

They tried to be morally pure in even the smallest ways.

But investors can now choose from several dozen religion-based mutual funds, created with the intent of keeping portfolios morally pure.

But by the 19th century, children had come to be seen as innocent, and women as morally pure.

It was intimated that the party's self-projection as a morally pure alternative had been sullied.

Shaw wrote a preface for the play's publication, in which he derided the idea that charities should only take money from "morally pure" sources.