The Position and Possibilities of the Masonic Order from The Meaning of Masonry by Walter Leslie Wilmshurst.

“To comply with this definition of Initiation which it might be useful to apply as a test not only to those who seek for admission into the Order, but to ourselves who are already within it—it is obvious that special qualifications of mind and intention are essential in a candidate of the type likely to be benefited by the Order in the way that its doctrine contemplates, and that it is not necessarily the ordinary man of the world, personal friend and good fellow though he be according to usual social standards, who is either properly prepared for, or likely to benefit in any vital sense by, reception into it.” [via]