A believer can and may “go to heaven” any time and any place, that is, he becomes conscious of the active Presence of God. When he enters he receives blessing and righteousness from the Lord. Is that awesome or what?
Who may “go to heaven” at any time? He who has clean hands and a pure heart, who is innocent in deed and thought. So he must get clean by washing in the innocent Blood of Jesus. Since only He qualifies anyone may and must go in with Him, by repentance and faith in the Gospel.
It is Sin that separates a human being from God and the Holy Place, His living Presence. Thus Sin is an Enemy that needs to be overcome constantly. We have such an Overcomer: He enters as the King of Glory, the Warrior-King of armies, the Lord strong and mighty, the Lord mighty in battle. He has defeated Sin and presently defeats it. That One brings us in with Him, right here, right now. Welcome!