Misquotations are the only quotations that are never misquoted.
It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.
Those who cannot remember the past are condemned to repeat it.
Doubt 'til thou canst doubt no more...doubt is thought and thought is life. Systems which end doubt are devices for drugging thought.
The man who is swimming against the stream knows the strength of it.
Man is the only animal that can remain on friendly terms with the victims he intends to eat until he eats them.
Meetings are indispensable when you don't want to do anything.