What is yoga?

Last night I attended my first official training as a yoga instructor. At the beginning the instructor asked us to freewrite about the question, "What is yoga?" Here is what I wrote.

A dip into the present moment when all other forms of mind erasure have failed. It's like a graceful dive into the mist, a cleansing and a clearing. Yoga is an act of awakening from the dream we call life. It is a journey outsdie of self-- with breath as an anchor, holding you to this plane as your spirit soars upward...