That one must do some work ...

That one must do some work seriously and must be independent and not merely amuse oneself in life-this our mother [Marie Curie] has told us always, but never that science was the only career worth following.
That one must do some work seriously and must be independent and not merely amuse oneself in life-this our mother [Marie Curie] has told us always, but never that science was the only career worth following.
 Irene Joliot-Curie

More phrases

Being self-made is a state of mind, and once you put that mentality to work, your success will come.
 Dave East
A lot of people change for good. Some people just fall off. Just trying to progress in anything, no matter what you're doing, I feel like any progression you make... some people aren't gonna be around you that were around you.
 Dave East
Effort only fully releases its reward after a person refuses to quit.
Never complain and never explain.
A good plan violently executed now is better than a perfect plan executed next week.
 George S. Patton