Spiritual evolution is a lifetime commitment and a way of life by which the world and all experience subserves spiritual intention. There is no greater calling than to choose to be a servant of God. With spiritual progress, each increment is of equal importance for, analogously, it is only by the removal of a single brick that an entire wall collapses, and the seemingly impossible becomes possible.
From: “Reality, Spirituality, and Modern Man” (2008), Chapter 19: Practicum, p. 350