Here are some good bits from Oscar Wilde's Lady Windermere's Fan. I recommend it:
"CECIL GRAHAM. What is a cynic? [Sitting on the back of the sofa.] 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."
"DUMBY. I congratulate you, my dear fellow. In this world there are only two tragedies. One is not getting what one wants, and the other is getting it. The last is much the worst; the last is a real tragedy!"
"LORD WINDERMERE. What is the difference between scandal and gossip? CECIL GRAHAM. Oh! gossip is charming! History is merely gossip. But scandal is gossip made tedious by morality. Now, I never moralise. A man who moralises is usually a hypocrite, and a woman who moralises is invariably plain. There is nothing in the whole world so unbecoming to a woman as a Nonconformist conscience. And most women know it, I'm glad to say."