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

“As the admission of every candidate into a Lodge presupposes his prior existence in the world without the Lodge, so our doctrine presupposes that every soul born into this world has lived in, and has come hither from, an anterior state of life. It has lives elsewhere before it entered this world: it will live elsewhere when it passes hence, human life being but a parenthesis in the midst of eternity.” [via]