" A world without memory is a world of the present. The past exists only in books, in documents...A spinster sees the face of the young man who loved her in the mirror of her bedroom, on the ceiling of the bakery, on the surface of the lake, in the sky. The tragedy of this world in that no one is happy, whether stuck in a time of pain or of joy. The tragedy of this time in that everyone is alone. For a life in the past cannot be shared with the present. Each person who gets stuck in time gets stuck alone. "

― Alan Lightman , Einstein's Dreams