Yoga is a science. Yoga has nothing to do with any particular religion. As there are physical sciences to create external well-being, yoga is the science for inner well-being. This yogic science is of utmost importance now, like never before, because today we have tremendous power in our hands. With modern science and technology, tomorrow if we want, we can flatten a mountain or city. When we have this much power in our hands, it is very, very important, that we have an inner sense, an awareness of life and that we experience life and everyone as part of ourselves."
The word "yoga" means union. Union means two have become one. There are only two in the existence -you and the rest of the existence. Yoga means to bring a union between the inner and the outer dimensions of experience.