Without hard work, nothing grows but weeds.
Never complain and never explain.
Be gentle to all and stern with yourself.
To know oneself, one should assert oneself.
Well done is better than well said.
Know or listen to those who know.
Who seeks shall find.
Either you run the day or the day runs you.
It's always too early to quit.
If you think you can do it, you can.
In science there is only physics all the rest is stamp collecting.