There are three rules for writing a novel. Good Thought, Good Word, and Good Deed. There are three principal means of acquiring knowledge . . . There are only three things to be done with a woman. Our education ought to help us to answer these questions.
Every truth passes through three stages before it is recognized.
There are three reasons why lawyers are being used more and more in scientific experiments. First, every year there are more of them around. Second, lab assistants don't get attached to them. And, third, there are some things that rats just won't do. To me there are three things everyone should do every day.