I Think You Could Add "Fear" to That Circle

But very true, either way.

 

Indexed: Man Is the Cruelest Animal 

Also:

The Criminal Element spoke often, and passionately, about the nefarious activities that every human being is capable of. Not only did it insist that the human heart was dark beyond all reckoning; it also likened the heart to a river. And further, it said, "If we are not careful, that river can carry us along in its hidden currents of want and anger and need, and transform each of us into the very criminal we fear.

 - Kate DiCamillo, Flora & Ulysses: The Illuminated Adventures