"This science is to know one's self: that we are spirit in man, that we are eternal, that we (as spirit) never die, that the man-body has been given to us as the golden opportunity in which we can realize that. So this practical subject is called "spirituality", not only having the labels of one religion or the other – that makes no difference." - Sant Kirpal Singh
Get the Book "Spirituality – what it is?" from here (Download):
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"Those who want to be successful in their life, in their worldly pursuits, and in the spiritual way of life, they have to start it from within and not from outside. Outside factors won’t help you when you do not prepare them from within. You have to prepare the outer effects from within and not from outside. Inside is the preparation, outside is the positive effect for the worldly things." - Sant Kirpal Singh
Get the Book "In Honor of Dr. Harbhajan Singh" (Biography) from here (Download):
http://www.kirpal-sagar.co.in/english/en/media-sidemenu/books-scriptures/biographies.html