Why does one need yoga? Because in the first place it does not interfere with western education. The church has still less influence. Necessary though discipline, reverence, and respect are, they are allowed to lapse, and life becomes empty, drab, lacking. Dharma is the one thing needed for the spiritual path, as both Shiva and Buddha say. One must get the tendency to respect and to revere, and this comes from worship. This one thing that is needed is developed by devotion. That is why it is better, if possible, to add a little of the color of beauty to raja yoga, and thus beautify your life.