Quotes From Famous People - Galileo Galilei

“It is not within the power of practitioners of demonstrative sciences to change their opinion at will, choosing now this and now that one”; there is “a great difference between giving orders to a mathematician or a philosopher and giving them to a merchant or a lawyer”. “Demonstrated conclusions about natural and celestial phenomena cannot be changed with the same ease as opinions about what is or is not legitimate in a contract, in a rental agreement, or in commerce”. -- Galileo Galilei