“Therefore, if the whole church assembles together and all are speaking in other languages and people who are uninformed or unbelievers come in, will they not say that you are out of your minds? But if all are prophesying and some unbeliever or uninformed person comes in, he is convicted by all and is judged by all. The secrets of his heart will be revealed, and as a result he will fall facedown and worship God, proclaiming, “God is really among you.”” (1 Corinthians 14:22–25 HCSB)

The aim of preaching the gospel to unbelievers is that:

  1. The secrets of the heart will be revealed — I take this to mean that they will be convicted of their sin, that they will come to understand the truth of Rom 3.23: “For all have sinned and fallen short of the glory of God.”
  2. They will fall facedown and worship God — The ultimate aim of preaching the gospel.  An understanding of our sin exposes our need for grace and when we understand that God took upon himself our sin (1 Pet 3.18: “Christ died for sins once for all, the just for the unjust, in order that he might bring us unto God, having been put to death in the flesh, but made alive in the spirit.”) what else can we do but fall facedown and worship God?