The Art and Science of Raja Yoga
by Swami Kriyananda
"Meditation is to religion what the laboratory is to physics or chemistry. Whether one follows the outward forms of religion depends more or less on personal taste,....The essence of religion is not its ceremonies, nor even its talk of a life hereafter, but its emphasis on an inner life here and now, and on the lasting peace that accompanies this inner life once it is discovered."
"Outward religious practices, of course, without the development of an inner life, are of secondary value. In their practical effects they are rather like trying to fly an airplane with an insufficient wingspread: No matter how much of a "racing start" one gets with them, he can't quite get up off the ground. Essential to the religious life is an inner unfoldment. Vital to this unfoldment is the daily practice of meditation."