The tides of time should be able to imprint the passing of the years on an object.

“The tides of time should be able to imprint the passing of the years on an object. The physical decay or natural wear and tear of the materials used does not in the least detract from the visual appeal, rather it adds to it. It is the changes of texture and colour that provide the space for the imagination to enter and become more involved with the devolution of the piece. Whereas modern design often uses inorganic materials to defy the natural ageing effects of time, wabi sabi embraces them and seeks to use this transformation as an integral part of the whole. This is not limited to the process of decay, but can also be found at the moment of inception, when life is taking its first fragile steps toward becoming.”
― Andrew Juniper, Wabi Sabi: The Japanese Art of Impermanence