'You eat food and see your desire, and whoever thus meditates on that Vaisvânara Self, eats food and sees his desire, and has Vedic glory in his house. 'That, however, are but the feet of the Self, and your feet would have given way, if you had not come to me.'

In plain words: The king says earth-worship brings food, wishes and honor. But the earth is only the feet of the universal Self. Without the fuller teaching Uddalaka's feet might have given way.