A koan is a piece of old wisdom in a very concise form. I think of it as a vial of ancient light that has been passed down to us. It’s the same light that was in the heart of the teacher who invented the koan. So, if you can get the vial open, what will pour out is your inheritance. It won’t be the usual kind of inheritance with bank accounts, real estate, debts and family feuds. This inheritance will be a perspective—the way an old master saw and experienced the world.