Passage
And if a man take his sister, his father's daughter, or his mother's daughter, and see her nakedness, and she see his nakedness, that is a disgrace; and they shall be cut off before the eyes of the children of their people: he hath uncovered his sister's nakedness; he shall bear his iniquity.
Nearby Context
Leviticus 20:15 And if a man lie with a beast for copulation, he shall certainly be put to death; and ye shall kill the beast.
Leviticus 20:16 And if a woman approach unto any beast to gender therewith, thou shalt kill the woman and the beast: they shall certainly be put to death; their blood is upon them.
Leviticus 20:17 And if a man take his sister, his father's daughter, or his mother's daughter, and see her nakedness, and she see his nakedness, that is a disgrace; and they shall be cut off before the eyes of the children of their people: he hath uncovered his sister's nakedness; he shall bear his iniquity.
Leviticus 20:18 And if a man shall lie with a woman in her infirmity, and uncover her nakedness, her flux doth he lay bare, and she hath uncovered the fountain of her blood; and both of them shall be cut off from among their people.
Leviticus 20:19 And the nakedness of thy mother's sister, and of thy father's sister shalt thou not uncover; for he hath laid naked his near relation: they shall bear their iniquity.
Study Lenses
The verse centers on "grace", "take", "sister", "father's", "daughter", "mother's", and "nakedness". It is saying that the verse draws attention to "grace" and "take", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 16's "And if a woman approach unto any..." into verse 18's "And if a man shall lie with...", so "grace" and "take" belong inside that flow. In Leviticus context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "grace" and "take" with trust shaped by these words, not by a vague optimism outside the passage.