"PAIN" in either 2007 or 08

I am......

life's seething little teacher
joy's creepy, silent partner
routine's constant companion
your little one's unveiled rejection
faith's unexpected concubine
fear's comrade
failure's muse
accomplishment's uncompromising ladder
the soul's unrelenting intruder
experience's brooding soldier
the beginning and the end

I am the source of life's awareness.
Your birth, your life, your death,
all abide within me.