Thus in my ear does nature's message run

Bullets burn and Sex feels good. I could attribute that to the metaphysical explanations of gods, demons, and sin or I could listen to nature's message and realize that the human body evolved and adapted to survive, reproduce, and die like other organisms on Planet Earth.

"Man crawls and dies: all is but born to die:
The world ’s the empire of destructiveness.
This frail construction of quick nerves and bones
Cannot sustain the shock of elements;
This temporary blend of blood and dust
Was put together only to dissolve;
This prompt and vivid sentiment of nerve
Was made for pain, the minister of death:
Thus in my ear does nature’s message run."
 Voltaire

"Really I am not much impressed with the people who say: "Look at me: I am such a splendid
product that there must have been design in the universe." I am not very much impressed by the splendor of those people. Moreover, if you accept the ordinary laws of science, you have to suppose that human life and life in general on this planet will die out in due course: it is merely a flash in the pan; it is a stage in the decay of the solar system; at a certain stage of decay you get the sort of conditions and temperature and so forth which are suitable to protoplasm, and there is life for a short time in the life of the whole solar system. You see in the moon the sort of thing to which the earth is tending -- something dead, cold, and lifeless".
Bertrand Russell