A scientist sets out to conquer nature through knowledge - external nature, external knowledge. By these means he may split the atom and achieve external power. A yogi sets out to explore his own internal nature, to penetrate the atom (atma) of being. He does not gain dominion over wide lands and restless seas, but over his own recalcitrant flesh and febrile mind.
B.K.S. IyengarYoga is the rule book for playing the game of Life, but in this game no one needs to lose. It is tough, and you need to train hard. It requires the willingness to think for yourself, to observe and correct, and to surmount occasional setbacks. It demands honesty, sustained application, and above all love in your heart.
B.K.S. IyengarWhy should you practice Yoga? To kindle the divine fire within yourself. Everyone has a dormant spark of divinity in him which has to be fanned into flame.
B.K.S. Iyengar