The two uses of "See" here draw our attention to the contrast between these two situations. Alternate translation: "Truly I was born in iniquity ... But you desire trustworthiness"
Being a sinner is spoken of as being in iniquity. Alternate translation: "I was already a sinner when I was born" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Being a sinner is spoken of as being in sin. Alternate translation: "even when my mother conceived me, I was a sinner" (See: [[rc://en/ta/man/translate/figs-metaphor]])