By prayer I mean not merely prayer from the mouth, but of the mind and heart, of all the powers of the soul and senses of the body. This is the prayer prayed by the soul who wills and desires to find this divine light, studying, meditating and reading without cease in the Book and the more-than-a-book of Life. This Book of Life is the entire life of Christ while he lived as a mortal on earth.

p. 302 - The Memorial and Instructions