Every decade needs its own manual of handicraft.
When the traveler goes alone he gets acquainted with himself.
One's happiness depends less on what he knows than on what he feels.
There are two essential epochs in any enterprise - to begin, and to get done.
The true purpose of education is to teach a man to carry himself triumphant to the sunset.
There is no excellence without labor. One cannot dream oneself into either usefulness or happiness.
No beast has ever conquered the earth; and the natural world has never been conquered by muscular force.
A person cannot love a plant after he has pruned it, then he has either done a poor job or is devoid of emotion.
Science may eventually explain the world of How. The ultimate world of Why may remain for contemplation, philosophy, religion.
Anyone who acquires more than the usual amount of knowledge concerning a subject is bound to leave it as his contribution to the knowledge of the world.