en_tn_lite_do_not_use/jhn/09/41.md

If you were blind, you would have no sin

Blindness is a metaphor for not understanding spiritual things, and having sin is a metonym for being guilty of sin. Alternate translation: "If you truly were spiritually blind, you would not be guilty of your sin" (See: rc://en/ta/man/translate/figs-metaphor and rc://en/ta/man/translate/figs-metonym)

but now you say, 'We see,' so your sin remains

Here "seeing" is a metaphor for understanding spiritual things, and "sin remaining" is a metonym for continuing to be guilty of one's sin. Alternate translation: "but since you think that you understand spiritual truth, you remain guilty of your sin" (See: rc://en/ta/man/translate/figs-metaphor and rc://en/ta/man/translate/figs-metonym)