Exodus 33:19 - Joseph Benson’s Commentary on the Old and New Testaments

I will make my goodness pass before thee Moses's request was to see God's glory, and God answers him by promising to show him his goodness; intimating that, however, in themselves, all God's attributes are glorious, yet he glories most in the manifestation of his goodness, and that his creatures need this most. Pass before thee So that thou mayest at least have a transient view of it. I will be gracious to whom I will be gracious I will show this peculiar favour to thee, and I will also be gracious to the people thou pleadest for; but not promiscuously to all: some, namely, such as turn to me in true repentance, I will pardon and save; but others, even all that are finally impenitent, I will eternally punish.