Adam Clarke on Exodus 33:11

The Lord spake unto Moses face to face - That there was no personal appearance here we may readily conceive; and that the communications made by God to Moses were not by visions, ecstasies, dreams, inward inspirations, or the mediation of angels, is sufficiently evident: we may therefore consider the passage as implying that familiarity and confidence with which the Divine Being treated his servant, and that he spake with him by articulate sounds in his own language, though no shape or similitude was then to be seen.

Joshua, the son of Nun, a young man - There is a difficulty here. Joshua certainly was not a young man in the literal sense of the word; "but he was called so," says Mr. Ainsworth, "In respect of his service, not of his years; for he was now above fifty years old, as may be gathered from Jos 24:29. But because ministry and service are usually by the younger sort, all servants are called young men, Gen 14:24." See also Gen 22:3, and Gen 41:12. Perhaps the word נער naar, here translated young man, means a single person, one unmarried.