" SIR ROBERT CHILTERN: … But may I ask, at heart, are you an optimist or a pessimist? Those seem to be the only two fashionable religions left to us nowadays.MRS CHEVELEY: Oh, I'm neither. Optimism begins in a broad grin, and Pessimism ends with blue spectacles. Besides, they are both of them merely poses.SIR ROBERT CHILTERN: You prefer to be natural?MRS CHEVELEY: Sometimes. But it is such a very difficult pose to keep up.(Act I., lines 132-140) "