This separated them (and everyone that came after them, including us) from being able to have a close relationship with God. He is perfect and cannot be surrounded by sin. As sinners, we couldn't make it there on our own. So, God made a way that we could be united with Him in heaven.
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. For God sent not his Son into the world to condemn the world; but that the world through him might be saved. John 3:16-17
For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord. Romans 6:23
Jesus was born so that He could teach us the way and die for our sins so that we would not have to. Three days after His death, He rose from the grave, proving Himself victorious over death.
But for us also, to whom it shall be imputed, if we believe on him that raised up Jesus our Lord from the dead; who was delivered for our offences, and was raised again for our justification. Romans 4:24-25
He bridged the gap between God and man so that we may have a personal relationship with Him and actually know Him, if we would only believe.
And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent. John 17:3
Most people believe in GOD. but so does Satan. To receive salvation, we must turn to GOD, form a personal relationship, turn away from our sins and follow him. We must trust in Jesus with everything we have and everything we do. We are made right in God's sight when we trust in Jesus Christ to take away our sins. And we all can be saved in this way, no matter who we are or what we have done.
Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference: Romans 3:22
The Bible teaches that there is no other way to salvation than through Christ.
Jesus is the only way of salvation because He is the only One who can pay our sin penalty. No other religion teaches the depth or seriousness of sin and its consequences. No other religion offers the infinite payment of sin that only Jesus Christ could provide. No other "religious founder" was God become man.
In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made. In him was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not. And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth. John 1:1-5, 14
The only way an infinite debt could be paid would be if GOD paid the debt. Jesus had to be God so that He could pay our debt. Jesus had to be man so He could die. Salvation is available only through faith in Jesus Christ!
Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved. Acts 4:12
Tell the truth! Speak the name of Jesus! Open that can of worms with those around you! People around you just might be pleasantly surprised at what comes out of the can.