Either you run the day or the day runs you.
Never complain and never explain.
Problems are not stop signs, they are guidelines.
Only the educated are free.
Always desire to learn something useful.
To be a good loser is to learn how to win.
It's always too early to quit.
Be kind whenever possible. It is always possible.
Without hard work, nothing grows but weeds.
Well done is better than well said.
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.