No people is wholly civilized where a distinction is drawn between stealing an office and stealing a purse.

The credit belongs to those who are actually in the arena, who strive valiantly; who know the great enthusiasums, the great devotions, and spend themselves in a worthy cause; who at best know the triumph of high achievement; and who, at worst, if they fail, fail while daring greatly, so that their place shall never be with those cold and timid souls who know neither victory nor defeat.

Unrestrained greed means the ruin of the great woods and the drying up of the sources of the rivers.

For us is the life of action, of strenuous performance of duty; let us live in the harness, striving mightily; let us rather run the risk of wearing out than rusting out.

For unflagging interest and enjoyment, a household of children, if things go reasonably well, certainly all other forms of success and achievement lose their importance by comparison.

There are those who believe that a new modernity demands a new morality. What they fail to consider is the harsh reality that there is no such thing as a new morality. There is only one morality . All else is immorality.

There is superstition in science quite as much as there is superstition in theology, and it is all the more dangerous because those suffering from it are profoundly convinced that they are freeing themselves from all superstition.