“By one man sin entered into the world.” – “That which is born of the flesh is flesh.” – “We are by nature children of wrath.” – “The carnal mind is enmity against God.” – “Out of the heart (naturally as out of a fountain) proceed evil thoughts, adulteries,” and the like. (John 3:6; Ephesians 2:3; Romans 8:7; Mark 7:21).