Talk to every woman as if you loved her, and to every man as if he bored you, and at the end of your first season you will have the reputation of possessing the most perfect social tact. A Woman of No Importance

Is this a dagger which I see before me, The handle toward my hand? Macbeth 

When a simple man who has no skill in dialectics believes an argument to be true which he afterwards imagines to be false, whether really false or not, and then another and another, he no longer has any faith left, and great disputers, as you know, come to think, at last that they have grown to be the wisest of mankind; for they alone perceive the utter unsoundness and instability of all arguments, or, indeed, of all things, which like the currents in the Euripus, are going up and down in never-ceasing ebb and flow. The Trials Of Socrates

There are those who imagine that the unlucky accidents of life—life's "experiences"—are in some way useful to us. I wish I could find out how. I never know one of them to happen twice. They always change off and swap around and catch you on your inexperienced side. Taming the Bicycle