Why did the Holy Spirit send Jesus to the wilderness to be tempted by Satan?

> The Spirit immediately drove him out into the wilderness. And he > was in the wilderness forty days, being tempted by Satan. And he was > with the wild animals, and the angels were ministering to him. (ESV) > > Mark 1:12–13 In this verse, the Holy Spirit sent Jesus into the wilderness to be tempted by Satan. Given that Jesus was the Son of God, the Holy Spirit must have known that Jesus could withstand the temptation. Why did the Holy Spirit do that then?