Its not good enough to only want to be a Christian or claim to be a Christian and not believe the truth. Nearly 70% of U.S. adults claim Christianity but are ignorant of the basics of faith. A Christian is one who knows God intimately by the Spirit of God, a personal being, whom the Son and Father co-indwell as stated in John 17.20-23: My prayer is not for them alone. I pray also for those who will believe in me through their message, that all of them may be one, Father, just as you are in me and I am in you. May they also be in us so that the world may believe that you have sent me. I have given them the glory that you gave me, that they may be one as we are one— I in them and you in me—so that they may be brought to complete unity. Then the world will know that you sent me and have loved them even as you have loved me (NIV).
Those who don’t have the Spirit are not true Christians: You, however, are not in the realm of the flesh but are in the realm of the Spirit, if indeed the Spirit of God lives in you. And if anyone does not have the Spirit of Christ, they do not belong to Christ. (Rom. 8.9 NIV). Of course it is entirely possible to Have the Spirit but be ignorant about Him or His indwelling. If so, it is an unnecessary and pathetic existence, your choice. The Corinthian Church may have had the same problem, and, if so, were told to test themselves if they were in the faith: Examine yourselves to see whether you are in the faith; test yourselves. Do you not realize that Christ Jesus is in you—unless, of course, you fail the test? (2Cor. 13.5 NIV).
Also, The Apostle Peter uses words with possibly the strongest admonition (all effort): Therefore, my brothers and sisters, make every effort to confirm your calling and election. For if you do these things, you will never stumble, and you will receive a rich welcome into the eternal kingdom of our Lord and Savior Jesus Christ. (2Pe. 1.10-11 NIV).
Here are the statistics, read it and weep: