Time
Everything comes to him that hustles while he waits.
Teacher
Genius is one per cent inspiration and ninety-nine percent perspiration.
Work
I never did anything by accident, nor did any of my inventions come by accident; they came by work.
Science
I never did anything worth doing by accident, nor did any of my inventions come by accident; they came by work.
Success
Many of life's failures are people who did not realize how close they were to success when they gave up.
Perseverance, Persistence
Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
Time
There is time for everything.

