Tears are our birthright. The purpose of yoga is to know thyself. If thyself is having a moment of shimmering depression, let's look at it, then let it go.
When we get out of alignment with Spirit and we try to make or expect life to be something different than it really is, suffering happens. We all experience pain and suffering, but it is not the quintessential nature of life. Just because the earth turns away from the sun and night occurs doesn't mean that the sun isn't always shining. It might be hard to see sometimes, but goodness and divine beauty can always be found if you adjust your vision just right.
The Yoga of the Dream State has always held to be one of the fastest, most efficient ways of reaching a plateau experience of subtle and causal realms, thus quickly opening the door to stable adaptation at - and transcendence of - those realms.
"Why are we doing yoga? For health reasons? Perhaps a walk in the park would be better. To help someone else? There are so many ways of helping people...No, nothing of the kind. No motivation, no aims, only an agreeable appointment for the body to look forward to. We do it for the fun of it. To twist, stretch, and move around, is pleasant and enjoyable, a body holiday."
Back on typical schedule. I awaken between three and five, meditate for one or two hors, go straight to my desk and work till one or two P.M. The type of meditation I do varies, but the basic form is "the practice of the morning." or "ultimate guru yoga," where the true nature of one's own mind is the ultimate guru. The practice is: Upon waking, or upon passing from dream state to the waking state, look directly into the mind, inquire directly into the source of consciousness itself--inquire "Who am I?" if you like, or practice looking directly into the looker. Upon inquiring into the self, the self disappears, dissolving back into radiant Emptiness, and consciousness rests as absolute Freedom and Fullness, unbounded and unlimited, unborn and undying, unseen and unknown.
Most people think that aging is irreversible and we know that there are mechanisms even in the human machinery that allow for the reversal of aging, through correction of diet, through anti-oxidants, through removal of toxins from the body, through exercise, through yoga and breathing techniques, and through meditation.