The One Greater Than Moses
Moses asked the Lord to show him His glory, which is a dangerous thing to ask by a mortal (see Exo. 33:20). Out of His goodness though, the Lord passed by Moses showing His hind part while Moses was in a cleft of a rock covered by the Lord's hand (Exo. 33:18-24).
But the Lord has revealed His glory to Moses more clearly in His word. First, the Lord said to Moses, "I will make all my goodness pass before you and will proclaim before you my name 'The LORD.' And I will be gracious to whom I will be gracious, and will show mercy on whom I will show mercy'" (Exo. 33:19).
Then the Lord revealed Himself further to Moses as "the LORD, the LORD, a God merciful and gracious, slow to anger, and abounding in steadfast love and faithfulness, keeping steadfast love for thousands, forgiving iniquity and transgression and sin, but who will by no means clear the guilty, visiting the iniquity of the fathers on the children and the children's children, to the third and fourth generation" (Exo. 34:6-7).
Moses' time talking with God, hearing Him speak of His will for His people, knowing Him through His self-revelation, and seeing even just the back part of God, has a tremendous effect upon him. No doubt this encounter with God has changed Moses.
The Bible says, "When Moses came down from Mount Sinai...Moses did not know that the skin of his face shone because he had been talking with God. Aaron and the people of Israel saw Moses, and behold, the skin of his face shone, and they were afraid to come near him" (Exo. 34:29-30).
What the people saw in Moses was only a poor reflection of God's glory. But God was pleased to show to the people His delight in their mediator. That's why they needed to listen to him.
But another One who is greater than Moses has come. He is full of grace and truth and His disciples have seen His glory, not the reflected glory that God's servant Moses had, but the glory of the Son from the Father (John 1:14; cf. Matt. 17:2, 5, 6).
The Father is pleased with Him greatly confirming His delight with these words, "This is my beloved Son in whom I am well pleased; listen to him" (Matt. 17:5; cf. Matt. 3:17; Acts 3:22; Deut. 18:15, 18, 19). Anyone who listens to Him and believes in Him will see greater things than what Moses saw.