The Bible says that ALL have sinned and there is none righteous, we all fall short. So we NEED Christ's righteousness freely imputed unto us so as we, like Abraham believe in God and in him whom he sent:
And therefore it was imputed to him for righteousness. Now it was not written for his sake alone, that it was imputed to him; But for us also, to whom it shall be imputed, if we believe on him that raised up Jesus our Lord from the dead; Who was delivered for our offences, and was raised again for our justification. Rom. 4:22-24.
Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life. John 5:24
We trust Christ, not our own self-righteousness as it says:
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. Rom. 10