Be ware! Be ware The Nest and keep your wits about you - you may be being played! The Nest is equally useful and dangerous. If you mistake a student for a master, you may already be in an unspoken duel, trapped within an infinite kōan - which is dangerous. Extremely dangerous. But also extremely useful. However, although it can be dizzying to be drawn deeper into a kōan, say, perhaps by being asked another kōan, and finding yourself in a kōan within a kōan - for some reason one kōan can help you unlock another, so sometimes the only way forwards is to move up or down, or even backwards.