"Sensitivity is the principle of all action. A being, albeit animated, who would feel nothing, would never act, for what would its motive for acting be? God himself is sensitive since he acts. All men are therefore sensitive, and perhaps to the same degree, but not in the same manner. There is a purely passive physical and organic sensitivity which seems to have as its end only the preservation of our bodies and of our species through the direction of pleasure and pain. There is another sensitivity that I call active and moral which is nothing other than the faculty of attaching our affections to beings who are foreign to us. This type, about which study of nerve pairs teaches nothing, seems to offer a fairly clear analogy for souls to the magnetic faculty of bodies. Its strength is in proportion to the relationships we feel between ourselves and other beings, and depending on the nature of these relationships it sometimes acts positively by attraction, sometimes negatively by repulsion, like the poles of a magnet. The positive or attracting action is the simple work of nature, which seeks to extend and reinforce the feeling of our being; the negative or repelling action, which compresses and diminishes the being of another, is a combination produced by reflection. From the former arise all the loving and gentle passions, and from the latter all the hateful and cruel passions."

“Watch a cat when she comes into a room for the first time; she goes from place to place, she sniffs about and examines everything, she is never still for a moment; she is suspicious of everything till she has examined it and found out what it is. It is the same with the child when he begins to walk, and enters, so to speak, the room of the world around him. The only difference is that, while both use sight, the child uses his hands and the cat that subtle sense of smell which nature has bestowed upon it. It is this instinct, rightly or wrongly educated, which makes children skilful or clumsy, quick or slow, wise or foolish.”

“As soon as we have contrived to give our pupil an idea of the word "Useful," we have got an additional means of controlling him, for this word makes a great impression on him, provided that its meaning for him is a meaning relative to his own age, and provided he clearly sees its relation to his own well-being. This word makes no impression on your scholars because you have taken no pains to give it a meaning they can understand, and because other people always undertake to supply their needs so that they never require to think for themselves, and do not know what utility is. "What is the use of that?"”

“The supreme enjoyment is in satisfaction with oneself ; it is in order to deserve this satisfaction that we are placed on earth and endowed with freedom.”

“I shall need only myself to be happy.”

“Chère amie, ne savez-vous pas que la vertu est un état de guerre, et que, pour y vivre, on a toujours quelque combat à rendre contre soi?”

“Days of absence, sad and dreary,Clothed in sorrow's dark array,—Days of absence, I am weary: She I love is far away.”