Yoga is the union between history and now, between night and day, heaven and earth, a bird in flight that won't be caught. When we do manage to catch it, pin it down, analyse and systematise it we stumble into dangerous territory, the place where we mistake the map for the landscape, the body for the soul.
Actually, Yoga is just `normal'. We don't have to stamp on our heads with our feet while standing on our hands and it really doesn't matter if we see flashing lights or not - these things should be ignored. All we do with Yoga is come home to ourselves, whoever we are, in order to realise our place in the survival not just of ourselves, but of the human race on this planet.