If a person is stupid, we excuse him by saying that he cannot help it; but if we attempted to excuse in precisely the same way the person who is bad, we should be laughed at.
There's an interdependence between flowers and bees. Where there are no flowers there are no bees, and where there are no bees, there are no flowers. They are really one organism. And so in the same way, everything in nature depends on everything else.