Moses did not lead the Israelites with just his word, here we see him leading with his actions as well by setting up the Tabernacle.

It must have seemed odd to Moses to now be annointing his older brother -- who had been in Moses' shadow -- as high priest. Aaron's sons ruled over Moses' sons. Yet Moses was a faithful man, following hard after God.

There is a lesson in there for all Christians, I think, about the importance of humbling ourselves to God's will. Pride is a human emotion that can spoil God's plans if we do not make it subservient to Him.

Exodus 40