The down cycle is absolutely essential for spiritual realization. You must have failed deeply on some level or experienced some deep loss or pain to be drawn to the spiritual dimension. Or perhaps your very success became empty and meaningless and so turned out to be failure. Failure lies concealed in every success, and success in every failure. In this world, which is to say on the level of form, everybody "fails" sooner or later, of course, and every achievement eventually comes to naught. All forms are impermanent.

Eckhart Tolle

from The Power of Now: A Guide to Spiritual Enlightenment