We live alone in our cluttered psyches, possessed by our entrenched beliefs, our fatuous desires, our endless contradictions - and like it or not we have to put up with this in one another.
That is the worst moment, when you feel you have lost / The desires for all that was most desirable, / Before you are contented with what you can desire; / Before you know what is left to be desired; / And you go on wishing that you could desire / What desire has left behind.
Man desired concord; but nature knows better what is good for his species; she desires discord. Man wants to live easy and content; but nature compels him to leave ease... and throw himself into roils and labors.
Each atom is trying to fly off from its centre. In the internal world, each thought is trying to go beyond control. Again each particle in the external world is checked by another force, the centripetal, and drawn towards the centre. Similarly in the thought - world the controlling power is checking all these outgoing desires.