When Satan tries to convince you that you are unworthy to walk with the Lord and serve Him, you know it is not true. However, you may have a hard time being fully assured that He has made you clean and fit to stand before Him and faithfully serve Him. But the Word of God says that He has!
That ye might walk worthy of the Lord unto all pleasing, being fruitful in every good work, and increasing in the knowledge of God; strengthened with all might, according to his glorious power, unto all patience and longsuffering with joyfulness; giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light: who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son: in whom we have redemption through his blood, even the forgiveness of sins” (Colossians 1:10-14, KJV).
The Greek rendering of Colossians 1:10-14 is: “The Father has made us fit, worthy, qualified in character, good enough to be partakers in the inheritance of the saints of light.”
What Jesus did on the cross qualified you for eternal inheritance, and if God has qualified you for eternal life, then He has made you fit in character, as well. You could take a leave from ministry or service for a time, trying to make yourself fit for Him, but you could never do so. God will not accept anyone’s righteousness — except that of His own Son, Jesus Christ.
You will never be able to obtain the righteousness of Christ by working for it, so just believe and trust God for it. It comes to you by faith. You see, not only are you saved by faith but you are also sanctified by faith, justified by faith, healed by faith, kept by faith.
All this happens by believing in what Jesus has done for you.