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

“Hence every Candidate upon admission finds himself, in a state of darkness, in the West of the Lodge. Thereby he is repeating symbolically the incident of his actual birth into this world, which he entered as a blind and helpless babe, and through which in his early years, not knowing whither he was going, after many stumbling and irregular steps, after many deviations from the true path and after many tribulations and adversities incident to human life, he may at length ascend, purified and chastened by experience, to larger life in the eternal East.” [via]