You are in some kingdom or other at this very moment. Did you know this? Are you in the kingdom of God? If not, you are in one or other of the kingdoms of men. Martyn Lloyd-Jones warns us of our peril:
This phrase, “Yet once more,” indicates the removal of things that are shaken—that is, things that have been made—in order that the things that cannot be shaken may remain. Therefore let us be grateful for receiving a kingdom that cannot be shaken, and thus let us offer to God acceptable worship, with reverence and awe, for our God is a consuming fire. (Hebrews 12:27-29 ESV)
There is only one way of salvation, only one way to know God and to spend your eternity with Him – it is this – to believe the message concerning His Son, that the babe of Bethlehem is the eternal Son of God and that He died on the cross, not the death of a pacifist, He is the Lamb of God that taketh away the sin of the world. God hath laid on Him the iniquity of us all. He has punished Him instead of us and gives us His righteousness and we are clothed in it and we are children of God and heirs of eternal bliss.
My friends, there is no other way; this is an incomparable gospel. Hinduism will not get you into the kingdom, Confucianism will not, Buddhism will not. These things are coming into this country; none of them will bring you into the kingdom of God. There is only one way. Christ said, I am the light of the world. I am the way, the truth and the life. No man cometh unto the Father but by me. There is none other name under heaven given amongst men whereby we must be saved. It is exclusive, it is God’s own Son. So the world religions are of no value. This and this alone [Christianity] does what it promises to do. (“A Kingdom which cannot be Shaken”)