"Be yourself" is about the worst advice you can give some people.
A mind is as strong as its weakest think.
Seventy million books in America's libraries, but the one you want to read is always out.
Prohibition may be a disputed theory, but none can say that it doesn't hold water.
No brain is stronger than its weakest think.
There is no man so low down that the cure for his condition does not lie strictly within himself.