Once a person is able to achieve true singlemindedness in his practice and smash apart the old nest... into which he has settled... Wisdom immediately appears... and the all-discerning Fivefold Eye opens wide.

The Essential Teachings of Zen Master Hakuin: A Translation of the Sokko-roku Kaien-fusetsu (ed. Shambhala Publications, 2010) - ISBN: 9780834822184