Among the many and various teachings dispensed by Elijah to his friends, there are none so important as his theodicy, the teachings vindicating God's justice in the administration of earthly affairs. He used many an opportunity to demonstrate it by precept and example. Once he granted his friend Rabbi Joshua ben Levi the fulfilment of any wish he might express, and all the Rabbi asked for was, that he might be permitted to accompany Elijah on his wanderings through the world. Elijah was prepared to gratify this wish. He only imposed the condition, that, however odd the Rabbi might think Elijah's actions, he was not to ask any explanation of them. If ever he demanded why, they would have to part company. So Elijah and the Rabbi fared forth together, and they journeyed on until they reached the house of a poor man, whose only earthly possession was a cow. The man and his wife were thoroughly good-hearted people, and they received the two wanderers with a cordial welcome. They invited the strangers into their house, set before them food and drink of the best they had, and made up a comfortable couch for them for the night. When Elijah and the Rabbi were ready to continue their journey on the following day, Elijah prayed that the cow belonging to his host might die. Before they left the house, the animal had expired. Rabbi Joshua was so shocked by the misfortune that had befallen the good people, he almost lost consciousness. He thought: "Is that to be the poor man's reward for all his kind services to us?" And he could not refrain from putting the question to Elijah. But Elijah reminded him of the condition imposed and accepted at the beginning of their journey, and they travelled on, the Rabbi's curiosity unappeased. That night they reached the house of a wealthy man, who did not pay his guest the courtesy of looking them in the face. Though they passed the night under his roof, he did not offer them food or drink. This rich man was desirous of having a wall repaired that had tumbled down. There was no need for him to take any steps to have it rebuilt, for, when Elijah left the house, he prayed that the wall might erect itself, and, lo! it stood upright. Rabbi Joshua was greatly amazed, but true to his promise he suppressed the question that rose to his lips. So the two travelled on again, until they reached an ornate synagogue, the seats in which were made of silver and gold. But the worshippers did not correspond in character to the magnificence of the building, for when it came to the point of satisfying the needs of the way-worn pilgrims, one of those present said: "There is not dearth of water and bread, and the strange travellers can stay in the synagogue, whither these refreshments can be brought to them." Early the next morning, when they were departing, Elijah wished those present in the synagogue in which they had lodged, that God might raise them all to be "heads." Rabbi Joshua again had to