The rationale for offering water and fruit to the Gohonzon

The Gohonzon is a representation of a being, not merely a representation of the Law. Only a being requires food and water. The Gohonzon is a representation of the Master of Teachings Lord Shakya of the Original Doctine. From a more profound perspective, the Gohonzon IS the Master of Teachings Lord Shakya of the Original Doctrine.