The only thing DNA really does is code for proteins. Everything in our bodies is a result of the action or existence of proteins. Proteins form structures, comprise messengers and messages, start reactions and stop them--everything. There is no magic effluvium that tells your eyes to be blue--it's a protein. And no ethereal spirit tells your cochlea to signal your temporal lobe that the bells are ringing--it's protein.
Some people think that describing life this way is "dehumanizing". Have you ever examined the simplest of protein reactions? They are amazingly complex yet exquisitely precise--far beyond one of our paltry pieces of machinery in their power and consistency.
We are fearfully and wonderfully made!
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