Moses let Aaron speak and that caused huge problems at times...
Moses was a godly man, but on several important occasions, he distrusted God.
Best known is the situation when the Israelites complained about water.
Instead of trusting God's precise instructions, Moses did things his way and lost his opportunity to enter the Promised Land (Numbers 20:1-13).
But Moses' first mistake was refusing to be God's spokesman and letting Aaron replace him (Exodus 4:10-17).
What Aaron possessed in skill, he lacked in character.
He ended up using his speaking skills to lead the people in idol worship, tell one of the most ridiculous lies in the Bible (Exodus 32:21-14)* and mock Moses (Numbers 12).
Because Moses grew to trust God deeply, I'm sure he regretted having Aaron as a spokesman.
Moses came to realize something each of us need to learn: God is able to do things far beyond our imagination because of His power (Ephesians 3:20). Our part is to trust Him and yield to His work in our lives.
* Aaron's lie: "I threw [the people's jewelry] into the fire, and out came this calf!”
image: C.F. Vos from Bible Picture Gallery