Who can dwell where God dwells? Who can enter worship on His Holy Hill? Who can come in to the place where the Lord’s Presence is on the earth? Who can go to heaven on earth? Who will overcome the enemy by living in the presence of God? The answer: a believer in Jesus may “go to heaven” at any time, at any place, in any situation.
Only the holy, righteous, perfect person may be with God, the one who loves his neighbor as himself, the one who does do and does not do the ten descriptions of character and behavior listed in Psalm 15. These requirements are general and specific enough to convict every human being of sin, the enemy that keeps him away from enjoying life in the presence of the living God.
The only person who has lived this way is the only one who can get us in. Only Jesus enters and we go in with Him. We enter God’s presence, we “go to heaven,” by repentance and faith in the Gospel. Once in, we shall never be moved (scared, upset, anxious, guilty, or sad). Sin is defeated. That’s a promise.