If one does not fail at times, then one has not challenged himself.
Ferdinand Porsche
The errors which arise from the absence of facts are far more numerous and more durable than those which result from unsound reasoning respecting true data.
Charles Babbage
The secret to success is constancy of purpose.
Benjamin Disraeli
No plan survives contact with reality. (Inspired by “No plan survives the first enemy contact”)
Helmuth von Moltke
If you always do what you've always done, you'll always get what you've always got.
Henry Ford
The framing of a problem is often far more essential than its solution, because the exact framing of the problem leads to its solution.
Albert Einstein
One should never be so busy as to have no time left for contemplation.
Georg Christoph Lichtenberg
Many people are persistent in relation of the path they have taken, only few in concern of their goal.
Friedrich Nietzsche
Talent wins games, but teamwork and intelligence wins championships.
Michael Jeffrey Jordan
The boundaries of concrete are the boundaries of our imagination.
Bernd Hillemeier