Do you think that you are righteous ?

Righteousness: means right standing with God just as if we had never sinned.
As 2 Corinthians 5:21 KJVS says:
For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him.

“But we are all like an unclean thing, And all our righteousnesses are like filthy rags; We all fade as a leaf, And our iniquities, like the wind, Have taken us away. And there is no one who calls on Your name, Who stirs himself up to take hold of You; For You have hidden Your face from us, And have consumed us because of our iniquities. But now, O Lord, You are our Father; We are the clay, and You our potter; And all we are the work of Your hand. Do not be furious, O Lord, Nor remember iniquity forever; Indeed, please look—we all are Your people!” (Isaiah 64:6‭-‬9 NKJV).

“Therefore by the deeds of the law no flesh will be justified in His sight, for by the law is the knowledge of sin. But now the righteousness of God apart from the law is revealed, being witnessed by the Law and the Prophets, even the righteousness of God, through faith in Jesus Christ, to all and on all who believe. For there is no difference; for all have sinned and fall short of the glory of God, being justified freely by His grace through the redemption that is in Christ Jesus, whom God set forth as a propitiation by His blood, through faith, to demonstrate His righteousness, because in His forbearance God had passed over the sins that were previously committed, to demonstrate at the present time His righteousness, that He might be just and the justifier of the one who has faith in Jesus. ” (Romans 3:20‭-‬26 NKJV).

“…and be found in Him, not having my own righteousness, which is from the law, but that which is through faith in Christ, the righteousness which is from God by faith; that I may know Him and the power of His resurrection, and the fellowship of His sufferings, being conformed to His death,..” (Philippians 3:9‭-‬10 NKJV).

“But if we walk in the light as He is in the light, we have fellowship with one another, and the blood of Jesus Christ His Son cleanses us from all sin. If we say that we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. If we say that we have not sinned, we make Him a liar, and His word is not in us.” (I John 1:7‭-‬10 NKJV).

“Now unto him that is able to keep you from falling, and to present you faultless before the presence of his glory with exceeding joy, to the only wise God our Saviour, be glory and majesty, dominion and power, both now and ever. Amen.” [Jude 1:24‭-‬25 KJV].