A couple natural quotes :)

Charles Darwin wrote: "All sentient beings developed through natural selection in such a way that pleasant sensations serves as their guide, and especially the pleasure from sociability and from loving our families".

A Native American elder stated: "In my heart, there are two wolves: a wolf of love and a wolf of hate.  It all depends on which one I feed each day". 

These quotes demonstrate the complex biological nature we all derive from, and the sometimes simplistic psychological nature we all possess.  What nature will your attempt to nurture today?