To know oneself, one should assert oneself.
Never complain and never explain.
It's always too early to quit.
To be a good loser is to learn how to win.
If you think you can do it, you can.
Be kind whenever possible. It is always possible.
Be thine own palace, or the world's thy jail.
Either you run the day or the day runs you.
By failing to prepare, you are preparing to fail.
Begin to be now what you will be hereafter.
But to me the bottom line is the more education you can give yourself, and the more preparation you can do, the less chance of failing.