We shrink from change; yet is there anything that can come into being without it? What does Nature hold dearer, or more proper to herself? Could you have a hot bath unless firewood underwent some change? Could you be nourished if the food suffered no change? Is it possible for any useful thing to be achieved without change? Do you not see, then, that change in yourself is of the same order, and no less necessary to Nature?
– Marcus Aurelius, Meditations 7:18