Ramban on Ki Sisa 33:18

English: AND HE [Moshe] SAID: ‘SHOW ME, I PRAY THEE, THY GLORY.’ Moshe desired that he should actually see in clear sight the Glory of Hashem. It is possible that Thy Glory here means the Great Glory — the clear vision. 493 See Vol. I, p. 229. And Hashem answered him, I will make the measure of all My goodness pass before thee , 494 Verse 19. that you will comprehend and understand all My goodness more than all men, but the vision of the Presence that you have asked for, you will not be able to see.