If you think you can do it, you can.
What you do today can improve all your tomorrows.
If you can dream it, you can do it.
It's always too early to quit.
Always desire to learn something useful.
I can, therefore I am.
The most effective way to do it, is to do it.
Without hard work, nothing grows but weeds.
Know or listen to those who know.
To know oneself, one should assert oneself.
Don't take too much comfort in the fact that you're successful today because tomorrow could bring failure. There's no surety in life.