The strongest feelings assigned to the conscience are not moral feelings at all; they express merely physical antipathies.

Eternal vigilance is the price of knowledge.

A simple life is its own reward.

There is nothing to which men, while they have food and drink, cannot reconcile themselves.

Wisdom lies in taking everything with good humor and a grain of salt.

The earth has music for those who listen.

The traveller must be somebody and come from somewhere, so that his definite character and moral traditions may supply an organ and a point of comparison for his observations.