What does the phrase 'Who shall ascend into the hill of the Lord' mean?

The phrase 'Who shall ascend into the hill of the Lord?' from Psalm 24 asks a profound question about who is worthy to enter into God's holy presence. The underlying meaning reminds us of humanity's inability to stand before a holy God because of our sinful nature. This necessitates a mediator, and the answer to this question ultimately points to Jesus Christ. He alone has clean hands and a pure heart, making Him the only one capable of entering into God's presence on our behalf. Through His righteousness, we, too, can ascend with Him, as He represents us as our federal head.