“Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind, nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God. And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God.” (1 Corinthians 6:9-11)
We may attempt to cover our sin, but we cannot hide who we are. Drunkards drink. Fornicators fornicate. Liars lie. When God saves a man he changes who that man is. He puts to death the man that was, and creates a man who did not exist before.
To be in Christ is to be a new creature. Your old man might have been a liar, a cheat, a fornicator, but he has been nailed with Christ to the cross and you have been raised with Christ to walk in newness of life. When you were unsaved no one had to tell you to “be who you are.” Sinning came naturally. You were not a sinner because you sinned; you sinned because you were a sinner.
All those who are in Christ are saints. Be who you are. Be holy even as He is holy. Live according to the new nature which God has given you.