A chunk near the end of the Otello Act I duet lip-synched by Jon Vickers (Otello) and Mirella Freni (Desdemona), from the Unitel film, with Herbert von Karajan conducting the Berlin Philharmonic, including our excerpt (at 1:21)
[The sky is now quite clear. Some stars are visible and, on the rim of the horizon, the blue reflection of the rising moon.]
OTELLO: Such is my soul's joy that I am afraid,
I am afraid that I will never again be granted
this divine moment
in the unknown future of my destiny.
DESDEMONA: Dispel such anguish.
Our love will not change from year to year.
OTELLO: Upon this prayer,
let the ranks of angels respond: Amen.
DESDEMONA: Amen, let them respond.
Jon Vickers (t), Otello; Leonie Rysanek (s), Desdemona; Rome Opera Chorus and Orchestra, Tullio Serafin, cond. RCA, recorded July-Aug. 1960
Jon Vickers (t), Otello; Mirella Freni (s), Desdemona; Vienna Philharmonic, Herbert von Karajan. Live performance from the Salzburg Festival, July 30, 1971
We've talked about this before, and for me the giveaway here is Otello's repeated "temo" ("I am afraid"). I suppose someone without his potentially disabling fear might express himself similarly at a moment of such perfect happiness -- and this is surely the greatest love scene, with or without music, ever imagined by the mind of artistic man, only somewhat undercut by our knowledge that by the end of the opera the man will murder the woman.
But again, listen to that repeated "temo," and tell me you're not hearing a man who, at the pinnacle of his success, both career-wise and personal, believes at every moment that in the next moment it could all be taken away from him. If for some reason you really, really hated Otello, and wanted to destroy him, and you knew this about him, this might be the angle you would work.