Jamieson, Fausset and Brown on Exodus 33:9-11

9-11. the cloudy pillar descended, and stood at the door of the tabernacle--How would the downcast hearts of the people revive--how would the tide of joy swell in every bosom, when the symbolic cloud was seen slowly and majestically to descend and stand at the entrance of the tabernacle!

as Moses entered--It was when he appeared as their mediator, when he repaired from day to day to intercede for them, that welcome token of assurance was given that his advocacy prevailed, that Israel's sin was forgiven, and that God would again be gracious.