It's always too early to quit.
Expect problems and eat them for breakfast.
To know oneself, one should assert oneself.
Leap, and the net will appear.
After a storm comes a calm.
The most effective way to do it, is to do it.
Be kind whenever possible. It is always possible.
Well done is better than well said.
I can, therefore I am.
The wise does at once what the fool does at last.
If global cooling will come soon - scientists will lose trust.