Isaiah 28:16
So this is what the Sovereign LORD says: “See, I lay a stone in Zion, a tested stone, a precious cornerstone for a sure foundation; the one who trusts will never be dismayed.

The one who fulfilled this prophecy is Jesus Christ:

⁴As you come to him, the living Stone—rejected by men but chosen by God and precious to him ⁵you also, like living stones, are being built into a spiritual house to be a holy priesthood, offering spiritual sacrifices acceptable to God through Jesus Christ. ⁶For in Scripture it says:
   ”See, I lay a stone in Zion,
      a chosen and precious cornerstone,
   and the one who trusts in him
      will never be put to shame.” ⁷Now to you who believe, this stone is precious. But to those who do not believe,
   ”The stone the builders rejected
      has become the capstone,⁸and,
   ”A stone that causes men to stumble
      and a rock that makes them fall.”They stumble because they disobey the message—which is also what they were destined for.

Jesus Christ came as the capstone, or the final finish to a our faith. Our faith begins and ends with Christ. For the one who believed Him 2000 years ago the stone meant salvation. However, for the ones who rejected Him the stone has become thir downfall.

God came in the flesh as the Christ and the stone even in these last days using the name of Christ Ahnsahnghong. If it were supposed to be easy to accept Him, why would His coming be a test for our faith? Why is there an elect? Clearly Christ must come in a way that is not easy to accept.  Otherwise why would many many be deceived at His 2nd Coming?

Matt. 24:⁴Jesus answered: “Watch out that no one deceives you. ⁵For many will come in my name, claiming, ‘I am the Christ, and will deceive many.

While there are many false Christs, people claiming to be the Christ, who can be deceived if Christ is coming a 2nd time in spirit form?