Grace vs Works

Romans 9:30 What shall we say then? That the Gentiles, which followed not after righteousness, have attained to righteousness, even the righteousness which is of faith. 31But Israel, which followed after the law of righteousness, hath not attained to the law of righteousness. 32Wherefore? Because they sought it not by faith, but as it were by the works of the law. For they stumbled at that stumblingstone; 33As it is written, Behold, I lay in Sion a stumblingstone and rock of offence: and whosoever believeth on him shall not be ashamed.

Romans 10:1Brethren, my heart's desire and prayer to God for Israel is, that they might be saved. 2For I bear them record that they have a zeal of God, but not according to knowledge. 3For they being ignorant of God's righteousness, and going about to establish their own righteousness, have not submitted themselves unto the righteousness of God. 4For Christ is the end of the law for righteousness to every one that believeth.