holdon said:
Dikaiosune - righteousness, is the right (eous) state relative to one's position.
You're leaving quite a bit out. the Strong's definition states this:
dikaiosunē - equity (of character or act); specifically (Christian) justification: - righteousness.
Thayer's definition:
dikaiosunē
Thayer Definition:
1) in a broad sense: state of him who is as he ought to be, righteousness, the condition acceptable to God
1a) the doctrine concerning the way in which man may attain a state approved of God
1b) integrity, virtue, purity of life, rightness, correctness of thinking feeling, and acting
2) in a narrower sense, justice or the virtue which gives each his due
If God declares someone to be righteous, He must have some basis for that declaration, He cannot just make it up out of thin air, and declare someone to be righteous when they are manifestly NOT by their very deeds, thoughts, and heart. Some have argued that God can just decide to forgive sins, in effect dismissing them by a wave of His Hand, but such an idea violates Justice, which is also an Attribute of God. Others argue that God takes the faith produced from a heart in bondage to sin, stained by the taint of sin and unrighteousness, and somehow declare that faulty product to be righteous according to His standard. Neither view is correct.
If we are declared righteous on the basis of what Christ has done on our behalf, that by definition is an imputation of Christ's Righteousness to us. We are declared to be righteous before God, NOT on the basis of anything we have done, but on the basis of what Christ has done.
Jer 23:5-6 KJV Behold, the days come, saith the LORD, that I will raise unto David a righteous Branch, and a King shall reign and prosper, and shall execute judgment and justice in the earth. (6) In His days Judah shall be saved, and Israel shall dwell safely: and this [is] His name whereby He shall be called, THE LORD OUR RIGHTEOUSNESS.
We are declared righteous on the basis of Christ, not ourselves. that is an imputation of the righteousness of Christ to us. We are justified before God by the death, and resurrection of Christ.