Using the combined, integrated force of the mind and body is more efficient than using one without the other. Since the body can only exist in the present, that's where the mind should be too (unless we deliberately choose to contemplate the past or future). At the same time, the body needs to be healthy and in optimum operating condition so that it can respond effectively to the mind's directives.

Our past cannot be changed, and to be preoccupied with it is inefficient in time and effort. Likewise, by fretting over the future, we only exhaust ourselves, making us less able to effectively respond when the future is actually upon us. By worrying about a mishap that may or may not take place, we're forced to undergo the event twice-once when imagining it and once again if and when we actually experience it.

By keeping the mind in the present, unless you deliberately want to contemplate the past or future, it's possible to firmly face life without fear. Then, no thoughts of past failures or future problems will exist in the mind, and a truly positive mental state will result-fudoshin, the "immovable mind".

Basically, if the mind stays in the present, it's impossible to worry. Upon careful consideration, it becomes clear that human beings are capable of worrying only about an event that has already transpired or one that may take place in the future (although the occurrence might have just happened or may be about to happen in the next instant). The present moment contains no time or space for worry.

Yoga is ideal for calming the mind and harmonizing with nature. Plus, since this meditation consists of listening to what's taking place in the instant, it brings the mind into the present, where the body resides, producing unification of mind and body.

If we fail to realize our full potential as human beings, we live more on an animalistic level. This is fine for dogs, cats, and chimpanzees but doesn't work quite so well for women and men. Without the capacity to freely shape our own lives, much as a sculptor might carve stone, we inevitably slip into negativity and depression.

A strong life force can be seen in physical vitality, courage, competent judgment, self-mastery, sexual vigor, and the realization of each person's unique talents and purpose in life. To maintain a powerful life force, forget yourself, forget about living and dying, and bring your full attention into this moment.