“Guard with jealous attention the public liberty. Suspect everyone who comes near that precious jewel. Unfortunately, nothingwill preserve it but downright force. When you give up that force, you are ruined. ”

“Suspicion is a virtue as long as its object is the public good, and as long as it stays within proper bounds. ... Guard with jealous attention the public liberty. Suspect every one who approaches that jewel.”

“There is no one force, no group, and no class that is the preserver of liberty. Liberty is preserved by those who are against the existing chief power. Oppositions which do not express genuine social forces are as trivial, in relation to entrenched power, as the old court jesters.”

“Liberty, the greatest of all earthly blessings - give us that precious jewel and you may take everything else!”

“When liberty is taken away by force, it can be restored by force. When it is relinquished by default it can never be recovered.”

“You only learn when you give your whole being to something. When you give your whole being to mathematics,you learn; but when you are in a state of contradiction, when you do not want to learn but are forced to learn, then it becomes merely a process of accumulation. To learn is like reading a novel with innumerable characters; it requires your full attention, not contradictory attention.”