Commentaries on the infinite

A brick is made of earth and therefore it has no independent existence. It's existence is derived from the earth itself. The brick is therefore only conventionally a brick while in reality it remains earth. It was earth before it came into existence and it will be earth again when it is broken up. Therefore it is earth really all the time. But the reality of the earth is also limited and relative since it is divisible (into a brick) and changeable and in time and space, it has no continuous existence.