I learned the value of hard ...

I learned the value of hard work by working hard.
I learned the value of hard work by working hard.

More phrases

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
Problems are not stop signs, they are guidelines.
 Robert Schuller
Never give up, for that is just the place and time that the tide will turn.
 Harriet Beecher Stowe

Quotes from the same author

Never doubt that a small group of thoughtful, committed people can change the world. Indeed. It is the only thing that ever has.
Always remember that you are absolutely unique. Just like everyone else.
Female animals defending their young are notoriously ferocious and lack the playful delight in combat which characterizes the mock combats of males of the same species. There seems very little ground for claiming that the mother of young children is more peaceful, more responsible, and more thoughtful for the welfare of the human race than is her husband or brother.
It is utterly false and cruelly arbitrary... to put all the play and learning into childhood, all the work into middle age, and all the regrets into old age.
And as I had my father's kind of mind-which was also his mother's-I learned that the mind is not sex-typed.