It's always too early to quit.
To know oneself, one should assert oneself.
You never know what motivates you.
If you're going through hell, keep going.
By failing to prepare, you are preparing to fail.
To be a good loser is to learn how to win.
What you do today can improve all your tomorrows.
The wise does at once what the fool does at last.
If you think you can do it, you can.
If you can dream it, you can do it.
I used to joke that if acting didn't work out, poetry was my commonsense fallback.