The people of Israel, in the wilderness, serve as an example to the people of God today that we must persevere to the end. It is possible to see the amazing power of God, sit under the Word, and yet not believe. Israel experienced all this and more, and fell in the desert.
A genuine Christian is one who perseveres to the end. The way we are taught to persevere is to keep our eyes on Christ- or, as this passage says, to “consider Jesus.”