Over time a web of exclusively self-centered acts builds networks of vanity, violence, oppression and delusion, and such iniquity is visited upon the children "to the third and fourth generation." Such sin, our shared negative heritage built up through many lifetimes, spreads like a cloud of poison gas, blinding us to the true mutuality and complementarity of life.
(Tilden Edwards, Living Simply through the Day)
Sums up the problem of sin and the human condition quite nicely. Worth pondering and considering what can be done about it... then taking some action that goes against this flow.