"Declining from the public ways, walk in unfrequented paths."

"If there be light, then there is darkness; if cold, heat; if height, depth; if solid, fluid; if hard, soft; if rough, smooth; if calm, tempest; if prosperity, adversity; if life, death."

"The soul of man is immortal and that it changes into other kinds of animals."

"There is geometry in the humming of the strings. There is music in the spacing of the spheres."

"A blow from your friend is better than a kiss from your enemy."