I hope to-morrow will be a fine day, Lane.
It never is, sir.
Lane, you're a perfect pessimist.
I do my best to give satisfaction, sir.

Pessimist: One who, when he has the choice of two evils, chooses both.

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)

I am but too conscious of the fact that we are born in an age when only the dull are treated seriously, and I live in terror of not being misunderstood. Don't degrade me into the position of giving you useful information. Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

Cecil Graham: What is a cynic?
Lord Darlington: A man who knows the price of everything, and the value of nothing.
Cecil Graham: And a sentimentalist, my dear Darlington, is a man who sees an absurd value in everything and doesn’t know the market price of any single thing.

It is a curious fact that people are never so trivial as when they take themselves seriously.