"Brilliant Disguise" has been called "a heart wrenching song about never being really able to know someone," and "a song about the doubts and struggles of married life."
Lagu "Brilliant Disguise" disebut sebagai "lagu yang menyayat hati tentang tidak mampu mengenal baik seseorang," dan "lagu yang bercerita tentang keraguan dan perjuangan dalam kehidupan pernikahan."