"Urusvati knows how multicolored Agni Yoga is. An attentive eye can distinguish many tints in its flame. Surrounding conditions do of course affect the colors of the flame. And at different times different kinds of yoga are needed. One can perceive the magnificence of Raja Yoga, the radiance of Bhakti Yoga, and the tension of Jnana Yoga, but one can also see the ever present need for the luminous Karma Yoga. Labor is a constant during these days of mankind’s confusion. Thus, amidst the varied flowers of Agni Yoga we can find the stem of Karma Yoga, upon whose foundation humanity will find salvation. 558."
January 1, 1970
https://en.wikiquote.org/wiki/Yoga