To know oneself, one should assert oneself.
It's always too early to quit.
If you're going through hell, keep going.
I can, therefore I am.
By failing to prepare, you are preparing to fail.
Be kind whenever possible. It is always possible.
The wise does at once what the fool does at last.
Quality is not an act, it is a habit.
Know or listen to those who know.
To be a good loser is to learn how to win.
The history of astronomy is a history of receding horizons.
Equipped with his five senses, man explores the universe around him and calls the adventure Science.