It is said that when Buddha attained enlightenment, all he wanted to do was to show the rest of us the nature of mind and share completely what he had realized. But he also saw, with the great sorrow of infinite compassion, how difficult it would be for us to understand.
For even though we have the same inner nature as Buddha, we have not recognized it because it is so enclosed and wrapped up in our individual ordinary minds.
Imagine an empty vase. The space inside is exactly the same as the space outside. Only the fragile walls of the vase separate one from the other. Our buddha mind is enclosed within the walls of our ordinary mind. But when we become enlightened, it is as if the vase shatters into pieces. The space “inside” merges instantly into the space “outside.” They become one: There and then we realize that they were never separate or different; they were always the same.