What do you mean by that?
There is an improv game where you have to fill in the blanks and then come up with phrases. "Things you can say about your (blank) but not you (blank). For example, things you can say about your truck but not your mother. "She's pulling a wide load." As always, context is everything. What Bildad said was correct. One born of woman cannot be pure. it is also untrue. There is a practical and a positional aspect to this. Practically, as long as we are in this flesh we will not be pure. But, "if anyone is on Christ He is a new creation." If we are in Christ we are positionally pure. We are in Christ. When God looks at us He sees us in Jesus. We aren't yet perfected but we are being made perfect. Both Job and Bildad are right. it depends on how you look at it. How do you see yourself; in the flesh or as God sees you? When we focus on how we see ourselves we get depressed. When we focus on how God sees us we can have peace and confidence and walk in the power of the Spirit and not the flesh.