Righteousness to my understanding as a believer means to be justified before God. It is being blameless before God. Our righteousness as Christians is not dependent on our attitude or actions. We are not righteous because of our obedience to God or because of our good deeds. Righteousness is a free gift from God to anyone who repents and accepts God’s salvation to man, Jesus Christ.

Romans 5:19 For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.

Romans 10:9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.

2Corinthians 5:21 “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.”

Galatians 2:21 “I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.”

Galatians 3:6 “Even as Abraham believed God, and it was accounted to him for righteousness.”

Galatians 3:21 “Is the law then against the promises of God? God forbid: for if there had been a law given which could have given life, verily righteousness should have been by the law.”

Philippians 3:9 “And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith”

James 2:23 “And the scripture was fulfilled which saith, Abraham believed God, and it was imputed unto him for righteousness: and he was called the Friend of God.”