Matthew Poole and continuators on Romans 10:3

3. For they being ignorant of Gods righteousness , and going about to establish their own righteousness , have not submitted themselves to the righteousness of God.

Here he shewes more particularly what Knowledge the Iewes wanted. They knew not the Righteousness of God (of which see Chap. 1.17. with the notes there) This was abundantly manifested, being witnessed by the Law and the Prophets, cap. 3.21. and a thing very needful to be known, as being that wherein mans Happiness consisted; but they were Ignorant of it.

Their personal and inherent Righteousness, a home-made-Righteousness, which is of their own spinning; this they designed to set up in the room of Gods Righteousness.

This notes the Pride that accompanyed their Ignorance, and that is in the hearts of men by Nature. They wont go abroad for that, which they think, they have or may have at home: They wont be beholding to another, for that which they suppose they have in themselves. They have Righteousness enough of their own working; and therefore they Reject and withdraw themselves from that which is of Gods Appointing.