In a liquid modern life there are no permanent bonds, and any that we take up for a time must be tied loosely so that they can be untied again, as quickly and as effortlessly as possible, when circumstances change - as they surely will in our liquid modern society, over and over again.
The problem of living in this modern world is the problem of finding room in it. The crowd principle is so universally at work through modern life that the geography of the world had been changed to conform to it. We live in crowds. We get our living in crowds. We are amused in herds.