Between a supremely perfected Buddha and us, who are ordinary, there is no difference as to substance. This “substance” can be likened to water. One of the salient characteristics of water is its conformability: when put into a round vessel it becomes round, when put into a square vessel it becomes square. We have this same adaptability, but as we live bound and fettered through ignorance of our true nature, we have forfeited this freedom. To pursue the metaphor, we can say that the mind of a Buddha is like water that is calm, deep, and crystal clear, and upon which the moon of truth reflects fully and perfectly. The mind of the ordinary man, on the other hand, is like murky water, constantly being churned by the gales of delusive thought and no longer able to reflect the moon of truth. The moon nonetheless shines steadily upon the waves, but as the waters are roiled we are unable to see its reflection. Thus we lead lives that are frustrating and meaningless.