His meditation will not necessarily follow a set course each time he sits down to practise it. At times it will take a turn quite independent of his will, desire, forethought, or planning. One day it will force him to dwell upon certain mistakes of the past, to acknowledge them feelingly, until the future seems hopeless. And then, imperceptibly, it will open a door to prayer; he will resolve to profit by his mistakes and follow wiser paths in the future, and the peace or joy which follows the descent of grace will attend the closing minutes of his prayerful exercise.
-- Notebooks Category 4: Elementary Meditation > Chapter 1: Preparatory > # 309