Treasury of Scripture Knowledge
2 Corinthians 5:17
Therefore, if any person is in [fellowship with] Christ, he is a new person. His old ways have passed away; now his ways have become new.
For the Gospel reveals how a person can be made right with God. It is through faith [in Jesus], from beginning to end, just as it is written [Hab. 2:4], "The righteous person will [obtain] life by [his] faith [in God]."
But now [i.e., under the Gospel age], a way of being considered right with God apart from [any] law has been made known. [The writings of] the law [i.e., the Pentateuch] and the prophets bear witness to this.
For just as many people [i.e., all mankind] were considered [by God] to be sinners [and thus to suffer physical death] through the disobedience of the one man [i.e., Adam]; even so, many people [i.e., all believing mankind] will be considered right with God [and thus live again] through the obedience of the one man [i.e., Christ].
Therefore, none of those who are in [fellowship with] Christ Jesus will be condemned.
For they did not know about God's way of making people right with Himself, so they attempted to establish their own way. In doing this they did not submit to God's way for being made right with Him.
1 Corinthians 1:30
But God brought you into [fellowship with] Christ Jesus, who was made to be God's wisdom for us. Through Christ you have received a right relationship with God, [as well as] holiness and redemption [i.e., being bought back from Satan].
and to be found in [fellowship with] Him, not having a righteousness of my own, acquired by observing the law of Moses, but one acquired through believing in Christ. This righteousness, which comes from God, is based on faith.