We are so vain as to set the highest value upon those things to which nature has assigned the lowest place. What can be more coarse and rude in the mind than the precious metals, or more slavish and dirty than the people that dig and work them? And yet they defile our minds more than our bodies, and make the possessor fouler than the artificer of them. Rich men, in fine, are only the greater slaves.

It is dishonorable to say one thing and think another; how much more dishonorable to write one thing and think another.

Every change of place becomes a delight.

The wise man then followed a simple way of life-which is hardly surprising when you consider how even in this modern age he seeks to be as little encumbered as he possibly can.

He that does good to another does good also to himself.

It is one thing to remember, another to know. To remember is to safeguard something entrusted to the memory. But to know is to make each thing one's own, not depend on the text and always to look back to the teacher. "Zeno said this, Cleanthes said this." Let there be space between you and the book.

There is no easy way from the earth to the stars.