Scripture tells us otherwise.
2 Corinthians 6:2For he says, “In a favorable time I listened to you, and in a day of salvation I have helped you.” Behold, now is the favorable time; behold, now is the day of salvation.
When we are born again, it happens NOW, while we are here on earth. We are new creatures in Christ, having died to the Law, and spiritually are NOW seated with Christ in heaven, sealed by the promised Holy Spirit until the day we are redeemed (the day we die).
We co-exist in both the heavenly realm and the earthly realm.
So if you lie to someone tomorrow are you still saved?