There is an element of mystery in our lives, an element of the unknown, that "shows itself and at the same time withdraws." We come upon it especially when we come upon our own shadow, our own unlived life. There is a music of time, an ebb and flow in our lives and in our relationships with one another, as mystery shows itself and withdraws. It is like the ebb and flow of the tide.
— John S. Dunne, The Music of Time