If you think you can do it, you can.
It's always too early to quit.
To be a good loser is to learn how to win.
After a storm comes a calm.
If you're going through hell, keep going.
Expect problems and eat them for breakfast.
Only the educated are free.
I can, therefore I am.
Either you run the day or the day runs you.
If you can dream it, you can do it.
I learned easily and had time to follow my inclination for sports (light athletics and skiing) and chemistry, which I taught myself by reading all textbooks I could get.