It's always too early to quit.
After a storm comes a calm.
Go for it now. The future is promised to no one.
Only the educated are free.
Be gentle to all and stern with yourself.
To be a good loser is to learn how to win.
Always desire to learn something useful.
You never know what motivates you.
Things do not happen. Things are made to happen.
The secret of getting ahead is getting started.
If God has made the world a perfect mechanism, He has at least conceded so much to our imperfect intellect that in order to predict little parts of it, we need not solve innumerable differential equations, but can use dice with fair success.