Machiavel's The Prince is to ethics what the work of Spinoza is to faith. Spinoza sapped the fundamentals of faith, and drained the spirit of religio… - Frederick II of Prussia

It has been said by a certain general, that the first object in the establishment of an army ought to be making provision for the belly, that being the basis and foundation of all operations.

I feel the deepest veneration for the divine being, and therefore I am careful not to attribute to him unjust, fickle behavior, which would be condemned by the meanest mortal. Because of that, dear sister, I prefer not to believe that the almighty, benevolent being is at all concerned with human affairs. Rather I do attribute everything that happens to the living beings and certain effects of incalculable causes and I silently bow down before this being which is worthy of adoration, by admitting my ignorance concerning his ways, which his godly wisdom chose not to reveal.

Je voulus faire un jet d’eau dans mon jardin; Euler calcula l’effort des roues pour faire monter l’eau dans un bassin, d’où elle devait retomber par des canaux, afin de jaillir à Sans-Souci. Mon moulin a été exécuté géométriquement, et il n’a pu élever une goutte d’eau à cinquante pas du bassin. Vanité des vanités! vanité de la géométrie!