Buddhism is not like a temple which, although we enter and leave, the temple remains.
Rather, it is like a real person.
When we come into the dojo to sit, he comes in with us. When we leave, he leaves.
Sometimes he is like an old man. Sometimes, he is like vast space. Sometimes a door. Sometimes a pillar.
Sometimes he is concealed in our heart. Sometimes, he is like dust falling through sunlight.