"Old age is far more than white hair, wrinkles, the feeling that it is too late and the game finished, that the stage belongs to the rising generations. The true evil is not the weakening of the body, but the indifference of the soul. Upon crossing the shadow line, it is more the desire to act than the power to do so that is lost. Is it possible, after fifty years of experiences and disappointments, to retain the ardent curiosity of youth, the desire to know and understand, the power to love wholeheartedly, the certainty that beauty, intelligence, and kindness unite naturally, and to preserve faith in the efficacy of reason? Beyond the shadow line lies the realm of even, tempered light where the eyes, not being dazzled any more by the blinding sun of desire, can see things and people as they are. How is it possible to believe in the moral perfection of pretty women if you have loved one of them? How is it possible to believe in progress when you have discovered throughout a long and difficult life that no violent change can triumph over human nature and that it is only the most ancient customs and ceremonies that can provide people with the flimsy shelter of civilization? "What's the use?" says the old man to himself. This is perhaps the most dangerous phrase he can utter, for after having said: "What's the use of struggling?" he will say one day: "What's the use of going out?" then: "What's the use of leaving my room?" then: "What's the use of leaving my bed?" and at last comes "What's the use of living?" which opens the portals of death."

“The art of resting is a part of the art of working. A man who is tired and greatly in need of rest cannot do any good work. We are all familiar with those terrible mornings after sleepless nights when our brains refuse to function. It would be useless then to attempt to apply the principles of the art of working. Those principles presuppose mind and body to be in good condition. The human organism cannot live without alternating work and rest.”

“Our poor bodies have strength and resources that we learn to know only when we are in the gravest situations.”

“Almost all of our fellow-beings deceive us, but a few of us have known the joy of meeting a woman or a man whose sincerity and frankness were genuine, who in almost every situation has behaved according to our wishes, and who in our most difficult moments has not forsaken us. Those few are familiar with that marvelous feeling: confidence. With at least one person they are able for a little while each day to lift the heavy visor of their helmets, breathe freely, and show their faces and their hearts without fear.”

“Marriage makes a man more vulnerable by doubling the expanse of sail exposed to the tempests of social life.”

“To amuse is not to teach. The object of teaching is to erect a framework of knowledge in a child's mind and gradually to bring the child as near as may be to the average level of intelligence. Later in life the facts taught by experience and new discoveries will add themselves to this framework. It is wrong to attempt to upset this natural order and to appeal to a child's mind by diverting it with the spectacle of modern life. Teaching by means of pictures, radio, and the cinema is in itself ineffective; these methods must not be used unless they involve some effort or special enthusiasm. That which is learned without difficulty is soon forgotten, and for the same reason, oral instruction which does not require the pupil's personal participation is almost always rather useless. Eloquence slides in and out of young minds. To listen is not to work.”

“There is not one who speaks of us in our presence as he does in our absence," wrote Pascal. "All affection is based on this mutual deception, and few friendships would survive if we knew what our friends were saying of us behind our backs.”