Let no-one ignorant of geometry enter. Said to have been inscribed above the door of Plato's Academy.
To think truly is noble and to be deceived is base.
Everything that deceives does so by casting a spell.
The soul of man is immortal and imperishable.
Welcome out of the cave, my friend. It's a bit colder out here, but the stars are just beautiful.
How can you prove whether at this moment we are sleeping, and all our thoughts are a dream; or whether we are awake, and talking to one another in the waking state?