When a rich guy asked Jesus what good thing he could do to inherit eternal life, Christ's reply in Matthew 19:17 was rather contrary. He simply said that there is only one good person, God. Was he just being picky?
Now we carelessly use the word "good" for all kinds of human endeavors. We say that somebody did a good job, or that so and so is a good person, or that we live in a good country. So, what was Jesus implying here? Was he just the kind of guy none of us likes to be around, because he is always correcting our grammar or vocabulary?
Actually, all of our human efforts at doing good are inadequate for eternal life. Ultimate good can only be done by God who began teaching righteousness via the commandments and because of our lack of capacity for good, concluded it in the cross.