There is an ineffable mystery that underlies ourselves and the world. It is the darkness from which the light shines. When you recognize the integrity of the universe and that death is as certain as birth, then you can relax and accept that this is the way it is. There is nothing else to do.
The truth is revealed by removing things that stand in its light, an art not unlike sculpture, in which the artist creates, not by building, but by hacking away.
Both nuns and mothers worship images,
But those the candles light are not as those
That animate a mother's reveries,
But keep a marble or a bronze repose.
Your world is all these elements. Of light and sound, of taste, smell, and touch, woven together in many dimensions on the fabulous loom of your brain. Your brain; the most complicated thing in the world, which you yourself grew...without even thinking about it.
It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing - a somewhat unfamiliar conception for the average mind. Furthermore, the equation E = mc², in which energy is put equal to mass, multiplied by the square of the velocity of light, showed that very small amounts of mass may be converted into a very large amount of energy and vice versa.
I can again thy former light restore, Should I repent me: but once put out thy light, Thou cunning'st pattern of excelling nature, I know not where is that Promethean heat That can thy light relume.