John Calvin on Deuteronomy 34:9

9. And Joshua the son of Nun. It is again shown how perseveringly God provided for the welfare of the people. We have already seen how, at the request of Moses, Joshua was chosen to succeed him. Now, when he is about to take upon him his office, “the spirit of wisdom” was imparted to him, that it might be effectually manifested that he was appointed by God. He had been, indeed, previously endowed with excellent gifts, but he was now much more splendidly adorned with the ensigns of dignity, in order that his calling by God might be more certainly proved; for thus is God wont to furnish those, whom He calls, with capacity for action. The imposition of hands was also subjoined, which was no empty symbol of God’s grace. But inasmuch as I have already fully spoken of these things, I now only lightly touch upon them.