"In the spiritual life it is not necessary to have a complete map of the path in order to begin traveling. On the contrary, having such complete knowledge may actually hinder rather than help the onward march. The deeper secrets of spiritual life are unraveled to those who take risks and who make bold experiments with it. They are not meant for the idler who seeks guarantees at every step. Those who speculate from the shore about the ocean shall know only its surface, but those who would know the depths of the ocean must be willing to plunge into it."