Is yoga a science or an art?

Wet Suit Girl in Stanley Park by Nina Zolotow

"Yoga is both. Where there is a technique, there is science. Yoga has its own technique of physiological, psychological, and supramental well-being of man. Like a musician who plays his instrument, the student or adept in yoga plays with his body, depicting various animate forms of nature. Like a sculptor fashioning out a sculpture, the yogi chisels his body and mind and expands his consciousness into the universe.

"If you accept the view that there is no art without philosophy, yoga is also a kind of philosophy, in which the practitioner is drawn to the shrine of divinity within himself. It is the art of living truly. Yoga does not express a view on life. Rather it is a way toward right living. Hence it is a science, an art, and a philosophy." —B.K.S Iyengar

From Sparks of Divinity: The Teachings of B.K.S. Iyengar from 1959 to 1975, Compiled by Noëlle Perez-Christiaens