Bad temper is its own safety valve. He who can bark does not bite.

If you love, you will suffer, and if you do not love, you do not know the meaning of a Christian life.

If I were at any time to set out on a career of deceit, it would be of Miss Marple that I should be afraid.

If you are to be Hercule Poirot, you must think of everything.

There is no question of defence. I have always acted in accordance with the dictates of my conscience. I have nothing with which to reproach myself.

As life goes on it becomes tiring to keep up the character you invented for yourself, and so you relapse into individuality and become more like yourself everyday.

The young people think the old people are fools -- but the old people know the young people are fools.