On Envy.

"The sin of envy is a precursor to wrath, much more subtle than its counterpart, and able to slip past one's watch over their heart easily if one is not vigilant.  Envy is like a thief, planting seeds of poisonous foliage round about the interior castle of the heart, lighting little fires of irritation and anger here and there.  Where wrath rages, envy smolders." - Jason Liske