Worry is evidence of an ill-controlled brain; it is merely a stupid waste of time in unpleasantness.

Ninety percent of the friction of daily life is caused by tone of voice.

Happiness includes chiefly the idea of satisfaction after full honest effort. No one can possibly be satisfied and no one can be happy who feels that in some paramount affairs he failed to take up the challenge of life.

The only way to write a great book is to write it with the eyes of a child who sees things for the first time.

Journalists say a thing that they know isn't true, in the hope that if they keep on saying it long enough it will be true.

Falsehood often lurks upon the tongue of him, who, by self-praise, seeks to enhance his value in the eyes of others.

You can only acquire really useful general ideas by first acquiring particular ideas . . . You cannot make bricks without straw.