1. God’s righteousness, Christ (Rom 10:1-7)
    Heb 5:8-9

The Jews do not know God’s righteousness, Christ, and try to establish their own righteousness. (Rom 10:1-3)

Rom 10:1 Brethren, my heart’s desire and prayer to God for Israel is, that they might be saved.
2 For I bear them record that they have a zeal of God, but not according to knowledge.
3 For they being ignorant of God’s righteousness, and going about to establish their own righteousness, have not submitted themselves unto the righteousness of God.

Christ is the end of the law, fulfilling the law to all who believe that Jesus is the Christ. (Rom 10:4)

Rom 10:4 For Christ is the end of the law for righteousness to every one that believeth.

Who can ascend to heaven? Who else would go down to hell? Christ alone rose from the dead and ascended into heaven. (Rom 10:6-7)

Rom 10:6 But the righteousness which is of faith speaketh on this wise, Say not in thine heart, Who shall ascend into heaven? (that is, to bring Christ down from above:)
7 Or, Who shall descend into the deep? (that is, to bring up Christ again from the dead.)

We come to righteousness and salvation through faith in Jesus as the Christ. (Rom 10:8-10)

Rom 10:8 But what saith it? The word is nigh thee, even in thy mouth, and in thy heart: that is, the word of faith, which we preach;
9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.

Jesus, the Christ, is the source of salvation. (Heb 5:8-9)

Heb 5:8 Though he were a Son, yet learned he obedience by the things which he suffered;
9 And being made perfect, he became the author of eternal salvation unto all them that obey him;