Those who know nothing of foreign languages know nothing of their own.

There ain't no surer way to find out whether you like people or hate them than to travel with them.

The man who goes alone can start today but he who travels with another must wait till that other is ready.

A child develops best when, like a young plant, he is left undisturbed in the same soil. Too much travel, too much variety of impressions, are not good for the young, and cause them as they grow up to become incapable of enduring fruitful monotony.