The Ascension of the Soul
“It is a very difficult thing to raise oneself above the level of the plane of consciousness on which one is. The effect of long continued association with the material world which one must combat is very deep seated. Just as, if an object is submitted for a great period to the play of light of a given colour, it will at length absorb and appropriate a modicum of that color.
“Hence the value of association with the Sant Sat Guru [living Master]. His influence gradually loosens the ties of the world, breaks the bonds of association with it and raises the spirit.” — “Phelps Notes”, by Myron Phelps: http://rsfaith.org/images/stories/RSFBooks/English/Phelps_Notes/phelps_notes_1.html