"My poor health was matched, as it often is when one is sick, by my poor mood. A deep melancholy often overtook me, and at times I asked myself whether life was worth the trouble of living. … Seeing that the general state of my health was so poor, my brother-in-law recommended a stiff regime of yoga practice to knock me into shape and strengthen me up to face life's trials and challenges as I approached adulthood"
January 1, 1970
https://en.wikiquote.org/wiki/B._K._S._Iyengar