The law of contraries explains the perpetual and self-repeating becoming of the universe. As soon as things have fully become themselves, they turn into their own opposite, then the same occurs to the latter. Motion, but no liberation. This also explains how our life is a tragic circle, in which our achievements incessantly slip away from us, and we get the contrary of what we aim at -- a tread mill(*) working in the void for nothing.
__Giovanni Papini, L'altra metà (2011), 1: The Law of Contraries
(*) In English in the text.