It read: 'Danger. All structures are unstable.' I said to my friend, 'That's a profound sutra [sacred scripture].' And we stood there in awe. Once you realize and accept that all structures (forms) are unstable, even the seemingly solid material ones, peace arises within you. This is because the recognition of the impermanence of all forms awakens you to the dimension of the formless within yourself, that which is beyond death.

Eckhart Tolle

from A New Earth: Awakening to Your Life's Purpose