The Deeper Symbolism of Freemasonry from The Meaning of Masonry by Walter Leslie Wilmshurst.

“But, in the advanced degree of M.M. the answer is that he comes ‘From the East,’ for by this time the Mason is supposed to have so enlarged his knowledge as to realize that the primal source of life is not in the ‘West,’ not in this world; that existence upon this planet is but a transitory sojourn, spent in search of ‘the genuine secrets,’ the ultimate realities, of life; and that as the spirit of man must return to God who gave it, so he is now returning from this temporary world of ‘substituted secrets’ to the ‘East’ from which he originally came.” [via]