All our knowledge has its origins in our perceptions.
Leonardo da Vinci
Whenever God wants to give us a gift, he wraps it up in a problem.
Norman Vincent Peal
One should never be so busy as to have no time left for contemplation.
Georg Christoph Lichtenberg
I hate vacations. If you can build buildings, why sit on the beach?
Philip Johnson
If an engineer has not had some failures, it is merely evidence that his practice has not been sufficiently extensive.
Benjamin Baker
Success is a law of the series, and failures are in between results. Who continues can not avoid to be successful one day.
Thomas Alva Edison
There are more people who surrender, than those who fail.
Henry Ford
When everything seems to be going against you, remember that the airplane takes off against the wind, not with it.
Henry Ford
Success consists of going from failure to failure without loss of enthusiasm.
Winston Churchill
Experience is called the sum of all our mistakes.
Thomas Alva Edison
