To be calm is the highest achievement of the self.

Zen Proverb

An inability to stay quiet is one of the conspicuous failings of mankind.

Walter Bagehot

A child learns quicker to talk than to be silent.

Norwegian proverb

Only put off until tomorrow what you are willing to die having left undone.

Picasso

Someone is sitting in the shade today because someone planted a tree a long time ago.

Warren Buffett

A bad worker blames his tools.

Australian Proverb