You don't understand because you are an Arminian Christian. You believe that salvation only occurs when "you make a decision to accept Christ into your heart". This language is not only unscriptural, you won't find this phrase anywhere in the Bible, but it is also false doctrine.
I am sure the other posters got a big laugh at this charge!!! You are new to this forum and so you have no idea what I believe about regeneration and conversion. I believe that regeneration and conversion are inseparable and simeltaneous in regard to chronology but that regeneration precedes conversion logically. The illustration of the bullet and hole analogy amply demonstrates my position and the grammar of 1 Jn. 5:1 substantiates it.
I believe in unconditional election.
If you don't like the fact that God says he can save adults who hear the Gospel and believe and that he forgives/washes away sins in baptism, which we are told to do to "all", then that is your problem.
No, it is YOUR problem and an Unbiblical problem. God has an elect that were chosen in Christ before the world began and they are ALL EQUALLY chosen TO salvation THROUGH the very same predestinated means - 2 Thessalonians 2:13-14 which is "through sanctification of the Spirit AND belief of the truth" and that is the "truth" found in the gospel.
This is how he saved every single solitary elect prior to Abraham without baptism or circumcision. This is how he saves every single solitary elect after Abraham without circumcision or baptism. This is how he saves dying infants WITHOUT circumcision or baptism (Jer. 1:5; Lk. 1:15). He does not have TWO different ways to save His elect.
God cannot save anyone contrary to what He has predestinated "according to his purpose" of salvation as revealed in His Word. He does not say one thing and do another. However, that is the gospel you teach - a false gospel rather than "the everlasting gospel" of "the blood of the everlasting covenant."