Go as far as you can see; when you get there, you'll be able to see farther.
If you have to ask how much it costs, you can't afford it.
A man generally has two reasons for doing a thing. One that sounds good, and a real one.
Well, I don't know as I want a lawyer to tell me what I cannot do. I hire him to tell how to do what I want to do.
No problem can be solved until it is reduced to some simple form. The changing of a vague difficulty into a specific, concrete form is a very essential element in thinking.