Along this pathway of self-control and self-purification (for such it is) every soul must travel on its way to the Kingdom. So narrow is this way, and so overgrown with the weeds of selfishness is its entrance, that it is difficult to find, and, being found, cannot be retained except by daily meditation. Without this the spiritual energies grow weaker, and the man loses the strength necessary to continue. As the body is sustained and invigourated by material food, so the spirit is strengthened and renewed by its own food—namely meditation upon spiritual things.
