Johnny B,
Ephesians 2:1-10 reveals that Salvation is a free gift offered to all men even when we were dead in our trespasses and sins. When Paul says that it is a free gift, it implies that it is not something you have to work for, but it is freely offered to all men WHO receive it through the confession of Jesus Christ as you alluded to in John 3:3 or better put, being born again.
Salvation is a gift God through Jesus offered to the entire world. John 3: 16 reveals that. For God so loved the World he gave his only begotten son. That WHOSOEVER believes on him, means anyone of any color, race, nation or creed can get in on or receive.
It is safe to say that not all men will receive and confess, but John 3:17 and on tells us why. Men love darkness and so reject this free Gift.
Would you clarify what you mean by foreknowledge being someones future faith, I am not understanding what you are getting at?
Grace and peace to you
Another thing about 3:18 of John "Whoever believes in him is not condemned, but whoever does not believe is condemned already, because he has not believed in the name of the only Son of God." This deals with the idea that people try to accuse God of, in His electing grace. That if He elects those for salvation, that automatically means He also elects those for eternal judgement. Verse 18 shows that this is not true, because they are condemned or judged already, they are guilty under the Law of God. The salvation of all men does not have eternal judgement with it, so God doesn't chose those for eternal judgement, why? Because they are condemned or judged already and it's not because they didn't chose Jesus, it's because they love darkness rather than light, verse 19-20.
John 3:17 "For God did not send his Son into the world to condemn the world, but in order that the world might be saved through him." Also notice, "the world might be saved", this lines up with I Timothy 2:4 and I Peter 3:9 (I need to thank peaceful believer for this, I came to understand this through talking her on this thread, thank you PB), it doesn't mean that all men will be saved here or that God wills that they be saved. I Timothy 2:4 & II Peter 3:9 says that God, wishes, wants, would, in 2:4, that He is not wanting, not desiring, not willing 3:9, here John 3:17 might be saved.
John 3:19-20 "And this is the judgment: the light has come into the world, and people loved the darkness rather than the light because their works were evil. 20 For everyone who does wicked things hates the light and does not come to the light. lest their works should be exposed." As stated above.
Here's where it wined's up in verse 21 "But whoever does what is true comes to the light, so that it may be clearly seen that his works have been carried out in God.” Carried out by God or John 1:13 "who were born, not of blood nor of the will of the flesh nor of the will of man, but of God."
They come to believe in the truth as a testimony that God gave them the power to become a child of His.