2 Corinthians 5:17
Therefore, if anyone is in Christ, he is a new creation; old things have passed away; behold, all things have become new.

In the Christian world, many are told by their church or the religion they follow “you are a Christian”. But what are the qualifiers? Well, these are mainly vain declarations and by church attendance, some religious involvement. Many times this type of sinner has experienced really nothing but possibly maybe some new friends to hang out with or a place to go once a week. But this is NOT indicative of being a new creation.
So who can answer the question? The ONLY person who can answer this is yourself. And your testimony would be the answer to others who challenge this. There should be a distinction of your old life and your new life. If this challenge is not met, expect that actual Christians will meet your declaration with much skepticism. Even those who are not Christians will question the veracity of your claim if they view you living the life of your old creation as well.

Scripture teaches us plainly, ALL things have become new. In order for this to happen, your old life must completely vanish or logic tells us that it is not renewed, or a new life. Often times, a sinner is told they have been born-again, yet the sinner carries on as if nothing really happened but believing they have been born-again.

Examine your faith, examine something called growth and maturity. If you have been re-born by God, like an infant you will grow and mature. You are learning new things each day and your enthusiasm to do so is also growing. If you find faith and repentance as a chore, this would be indicative of your old self thus most likely you have not been reborn. If you find yourself shirking and rebelling against biblical truths, again this is indicative of an old fallen creation.

You should be able to look back on your life as an old creation and now as a new creation and provide specific details and progress. If you cannot? Ask yourself if your church lied to you. If after many decades you cannot coherently share the Gospel, I am sorry to inform you that you are still an old creation. And I say this humbly out of love for you, not out of pride or condemnation.

The sad fact is that there are MANY deceivers out there. They are tare planters from the devil, telling anyone who buys their line that they are “new creations” only for that sinner to behave as their old self.

And this is the truth! If and when God makes you a new creation, there really is NO confusion about this. Every part of you realizes what just happened! You will want to shout this Good News to everyone! You will condemn your old life of sin and boast now only in the person and work of Jesus Christ who saved you from the pit of hell, who enabled you to walk through the gates of Hades into eternal life with Him!