1. Studia prima la scienza, e poi seguita la pratica, nata da essa scienza. Quelli che s'innamoran di pratica senza scienza son come 'l nocchier ch'entra in navilio senza timone o bussola, che mai ha certezza dove si vada
        Leonardo da Vinci


2. Reasonable people adapt themselves to the world.
   Unreasonable people attempt to adapt the world to themselves.
   All progress, therefore, depends on unreasonable people."
        B.Shaw


3. The preservation of the means of knowledge among the lowest ranks is of more importance to the public than all the property of the rich men in the country.
        John Adams (second US president)


4. The mathematical sciences particularly exhibit order, symmetry, and limitation; and these are the greatest forms of the beautiful.
        Aristotele (in Metaphysica)


5. Le verità sono facili di capire una volta scoperte.
       Galileo Galilei


6. L’autorità di mille non vale l’umile ragionamento di uno.
       Galileo Galilei


7. The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.
       Bertrand Russell


8. They who would give up an essential liberty for temporary security, deserve neither liberty or security.
       Benjamin Franklin


9. The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy.
       Martin Luther King, Jr.


10. Common sense is not so common.
        Voltaire (in Dictionnaire Philosophique 1764)