The waking have one common world, but the sleeping turn aside each into a world of his own
Stupidity is better kept a secret than displayed.
Dogs bark at a person whom they do not know.
Presumption must be quenched even more than a fire.
Men who are lovers of wisdom [i.e., philosophers] must be inquirers into many things.
Though wisdom is common, yet the many live as if they had a wisdom of their own.