You elements that clip us round about, 2131 Witness that here Iago doth give up 2132 The execution of his wit, hands, heart
"The “ever‑burning lights above” are the stars, and the “elements that clip us round about” are the natural forces or cosmic elements that surround and enclose humanity — air, water, earth, and fire — or, more poetically, the heavens and the natural world that bound the characters. Iago is invoking these as witnesses to his oath, asking them to bear witness that he is giving over his intellect (“wit”), his physical power (“hands”), and his loyalty (“heart”) to Othello’s service"