Our best efforts at holiness and love and service will never justify (make us just) in the eyes of God.
ARe you sure?
6 For he will render to every man according to his works: 7 to those who by patience in well-doing seek for glory and honor and immortality, he will give eternal life; 8 but for those who are factious and do not obey the truth, but obey wickedness, there will be wrath and fury. 9 There will be tribulation and distress for every human being who does evil, the Jew first and also the Greek, 10 but glory and honor and peace for every one who does good, the Jew first and also the Greek. 11 For God shows no partiality. Rom. 2
Our righteousness is not our own. It is the righteousness of Christ that we receive by grace, through faith that makes us just. To say that my works of righteousness contribute to my salvation is to say the righteousness of Christ and His sacrifice is not sufficient to make me right with God and keep me right with God. It would mean that I earn my salvation instead of receiving it as a free gift.
I think this is just a misunderstanding. For Christians, good works are not “my works of righteousness” but His.
8 For by grace you have been saved through faith; and this is not your own doing, it is the gift of God— 9 not because of works, lest any man should boast. 10 For we are his workmanship, created in Christ Jesus for good works, which God prepared beforehand, that we should walk in them." Eph. 2:10
They have been prepared beforehand, that we should walk in them. They are rooted in His grace, and we complete them by grace, through faith. The reason they contribute to our right relationship with God is that walking in the deeds He has prepared for us helps us to become more and more His workmanship.
To say that my works of righteousness contribute to my salvation is to say the righteousness of Christ and His sacrifice is not sufficient to make me right with God and keep me right with God.
I would agree, if I had your concept of “salvation”. For Catholics, salvation is not something that happens at one point in time, for all time, but a process that begins when we are born again and is completed when we complete this earthly life. Furthermore, they are not “my works of righteousness” but His, and they keep us right with God because they keep us walking in saving faith. Saving faith is faith that works.