Without theory, practice is but routine born of habit. Theory alone can bring forth and develop the spirit of inventions.

Let me tell you the secret that has led me to my goal. My strength lies solely in my tenacity.

The universe is asymmetric.

Imagination should give wings to our thoughts but we always need decisive experimental proof, and when the moment comes to draw conclusions and to interpret the gathered observations, imagination must be checked and documented by the factual results of the experiment.

Did you ever observe to whom the accidents happen? Chance favors only the prepared mind.

Chance favours a prepared mind.

The Greeks bequeathed to us one of the most beautiful words in our language--the word 'enthusiasm'--en theos--a god within. The grandeur of human actions is measured by the inspiration from which they spring. Happy is he who bears a god within, and who obeys it.