All the evils that men cause to each other because of certain desires, or opinions or religious principles, are rooted in ignorance. [All hatred would come to an end] when the earth was flooded with the knowledge of God.
MaimonidesThose who grieve find comfort in weeping and in arousing their sorrow until the body is too tired to bear the inner emotions.
MaimonidesContrast the experience with something worse and you cannot help feeling happy and grateful because... The change from trouble to comfort gives us more pleasure than uninterrupted comfort does.
Maimonides