Every motion, being motion under resistance, must sooner or later come to an end...

"Every motion, being motion under resistance, must sooner or later come to an end; every rhythmic oscillation (unless externally reinforced) suffers some loss of rate and amplitude. The planets ride through a lesser orbit, or will ride, than once they rode; the sun will shine less warmly and brightly as the centuries pass away; the friction of the tides will retard the rotation of the earth. This globe, that throbs and murmurs with a million motions, and luxuriates into a million forms of riotously breeding life, will some day move more leisurely in its orbit and its parts; the blood will run cooler and more slowly in our desiccated veins; we shall not hurry any more; like dying races, we shall think of heaven in terms of rest and not of life; we shall dream of Nirvana. Gradually, and then rapidly, equilibration will become dissolution, the unhappy epilogue of evolution. Societies will disintegrate, masses will migrate, cities will fade into the dark hinterland of peasant life; no government will be strong enough to hold the loosened parts together; social order will cease to be even remembered. And in the individual too, integration will give way to disruption; and that coordination which is life will pass into that diffuse disorder which is death. The earth will be a chaotic theatre of decay, a gloomy drama of energy in irreversible degradation; and it will itself be resolved into the dust and nebula from which it came. The cycle of evolution and dissolution will be complete. The cycle will begin again, and endless times again; but always this will be the denouement. Memento mori is written upon the face of life; and every birth is a prelude to decay and death."

-- Will Durant on Herbert Spencer's "Equilibration"