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Whatever is begun in anger ends in shame

For every minute you remain angry, you give up sixty seconds of peace of mind

How much more grievous are the consequences of anger than the causes of it.

One should not lose one's temper unless one is certain of getting more and more angry to the end.

There is nothing that so much gratifies an ill tongue as when it finds an angry heart.

Never do anything when you are in a temper, for you will do everything wrong