The Basis for Spiritual Life !
Christ's Finished Work for them He died for, is the basis for the Spirits Work for them and in them. Christ's Work for them by the Cross , is what makes them Righteous before God's Law and Justice as though they never have sinned Isa 53:11
11 He shall see of the travail of his soul, and shall be satisfied: by his knowledge shall my righteous servant justify many; for he shall bear their iniquities. or
Out of the anguish of his soul he shall see and be satisfied;
by his knowledge shall the righteous one, my servant,
make many to be accounted righteous,
and he shall bear their iniquities.
Rom 5:19b
19 For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.
And based on that, the Holy Spirit must do a work in them[Jn 16] by first showing them the finished work and the Righteousness that is put upon their account, this He does by the Instrumentality of the Gospel Rom 1:16-17
16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
17 For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith.
That Righteousness of God revealed to Faith, is the Righteousness that was imputed to ones account because of the Finished work of Christ that put away their sins that had been imputed to Him 2 Cor 5:21 , The Spirit shows that finished Work to sinners Christ died for, when He also gives them New Life !