"The simplest schoolboy is now familiar with truths for which Archimedes would have sacrificed his life."

"Nothing but heaven itself is better than a friend who is really a friend."

"Let us be grateful to people who make us happy, they are the charming gardeners who make our souls blossom."

"A friend is the one who comes in when the whole world has gone out."

"A friend knows the song in my heart and sings it to me when my memory fails."

"You can always tell a real friend: when you've made a fool of yourself he doesn't feel you've done a permanent job."

"I don't need a friend who changes when I change and who nods when I nod; my shadow does that much better."

"We call that person who has lost his father, an orphan; and a widower that man who has lost his wife. But that man who has known the immense unhappiness of losing a friend, by what name do we call him? Here every language is silent and holds its peace in impotence."

"One's friends are that part of the human race with which one can be human."

"In everyone's life, at some time, our inner fire goes out. It is then burst into flame by an encounter with another human being. We should all be thankful for those people who rekindle the inner spirit."