The Earth is a caravanserai where men come and stay for the night and when dawn breaks, one by one, they tramp their different ways. Kith and Kin are the words, we use for the attachment to the travellers cultivated in the caravanserai during the short term of acquaintance. Husband and wife are like two pieces of wood drifting down a flooded river; they float near each other for some time and when current comes between, they are parted; each must move on to the sea at its own rate and in its own time. There is no need to grieve over their parting of the two; it is the very nature of Nature that it should be so. (TDP, p. 351)