To base and entrust your life on what can be seen in this world is to commit oneself to unreality. The reality of things, indeed, the way, the truth and the life of the world is in what is not readily seen: Christ as Lord.
Jerusalem, temple, and king, all three bespoke of Yahweh’s kingship, as well as of His Kingdom and presence on earth and all the blessings bound up with it.
The Apostle Peter’s monumental sermon on Pentecost declares the Kingdom purposes and divine saving work of the Father, Son, and Holy Spirit which culminates in the new world order with Christ in charge.
If we humans willingly operate by the testimony of men in all sorts of matters, then how much more should we readily embrace the testimony of God concerning the death, resurrection, ascension, and rule of His Son?
If Christ is the holiness, righteousness, salvation, truth, grace, resurrection life, eternal life, and perfection of God, then the spirit of the world is the antithesis of all those.