"That great sacrifice of the Buddha is spoken of in all the sacred books of the Buddhists; but they have not understood the nature of the sacrifice, for many believe it to have been the descent of the Lord Buddha from Nirvanic levels after his Illumination to teach his Law. It is true that he did so descend, but that would not be anything in the nature of a sacrifice; it would only be an ordinary, but not very pleasant piece of work. The great sacrifice that he made was this spending of thousands of years in order to qualify himself to be the first of mankind who should help his brother-men by teaching to them the Wisdom which is life eternal. That work was done, and nobly done. We know something of the various incarnations that he took after that, as Bodhisattva of his time, though there may be many more of which we know nothing. He"
January 1, 1970
https://en.wikiquote.org/wiki/The_Masters_and_the_Path