Quality is not an act, it is a habit.
After a storm comes a calm.
If you're going through hell, keep going.
You never know what motivates you.
Always desire to learn something useful.
Things do not happen. Things are made to happen.
To know oneself, one should assert oneself.
Without hard work, nothing grows but weeds.
Know or listen to those who know.
If you've got a talent, protect it.
The best way to have a good idea is to have a lot of ideas.
Satisfaction of one's curiosity is one of the greatest sources of happiness in life.
Facts are the air of scientists. Without them you can never fly.