"Dark matter and dark energy are two things we measure in the universe that are making things happen, and we have no idea what the cause is."

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Such a thing as the child left alone to die in the hallway was unknown on the marsh. But here, in the dawn, was mortality itself. In the city were places to fall from which one could never emerge -- dark dreams and slow death, the death of children, suffering without grace or redemption, ultimate and eternal loss. The memory of the child stayed with him. But that was not to be the end of it, for reality went around in a twisting ring. Even the irredeemable would be redeemed, and there was a balance for everything. There had to be.

— Mark Helprin