To know oneself, one should assert oneself.
Never complain and never explain.
To be a good loser is to learn how to win.
The wise does at once what the fool does at last.
The secret of getting ahead is getting started.
The most effective way to do it, is to do it.
Begin to be now what you will be hereafter.
It's always too early to quit.
What you do today can improve all your tomorrows.
Either you run the day or the day runs you.
I'm someone who's done the opposite of whatever the received wisdom is, to keep your career going into your 50s.