Justification (how does man become right with God) by Faith

"But to him that worketh not (does not trust in their works to be right with God), but believeth on him (God, and specifically His Son who died on the cross and rose again for sinners) that justifieth the ungodly, his faith is counted for righteousness." ~ Rom 4:5

"For he (God the Father) hath made him (The Lord Jesus Christ) to be sin for us, who knew no sin; that we might be made the righteousness of God in him (the righteousness of Christ is put to our account)." ~ 2 Cor 5:21

"That if thou shalt confess (agree) with thy mouth the Lord Jesus (that Jesus is Lord), and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved (freed from the penalty of your sin, and clean from the filth of sin). For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation (declared righteous and at peace with God)." ~ Rom 10:9-10