It's always too early to quit.
You never know what motivates you.
Only the educated are free.
Without hard work, nothing grows but weeds.
After a storm comes a calm.
Be gentle to all and stern with yourself.
What you do today can improve all your tomorrows.
The wise does at once what the fool does at last.
Go for it now. The future is promised to no one.
Be kind whenever possible. It is always possible.
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.