Let hopes and sorrows, fears and angers be, And think each day that dawns the last you'll see; For so the hour that greets you unforeseen Will bring with it enjoyment twice as keen.
Genuine sorrows are very tranquil in appearance in the deep bed they have dug for themselves. But, seeming to slumber, they corrode the soul like that frightful acid which penetrates crystal.
Man is, at one and the same time, a solitary being and a social being. As a solitary being, he attempts to protect his own existence and that of those who are closest to him, to satisfy his personal desires, and to develop his innate abilities. As a social being, he seeks to gain the recognition and affection of his fellow human beings, to share in their pleasures, to comfort them in their sorrows, and to improve their conditions of life.