The line comes from Avengers: Infinity War, released in 2018, where Thanos explains his belief that the universe must be balanced by removing half of all life. In English the line is 'perfectly balanced, as all things should be,' and the Portuguese dub gives it the same calm, measured delivery. The moment became a widely shared meme template and reaction clip, used whenever two things are compared or a situation feels neatly, or darkly, even. Its longevity comes from that flexibility: it works seriously for Marvel fans and ironically for everyday jokes.