Over the spectrum of sound, there are various chords that bring about pure, unadulterated sadness the instant they're played. Just by pressing the correct piano keys to form a minor 9th is to enter a state of overpowering, mournful ennui. It's just a particularly sad chord. To be able to construct a complete song around such chords is like having a license to make your own anti-depressant medication.
James Blake has done such a task in "Limit to Your Love," with its elegiac chord progressions, dub-style echo chamber, and weighted voice. Strange symbols inhabit the video--of spinning fruit and garbage heaps--which I don't particularly understand, but when enveloped by the surreal and powerful effects of the song, all of these elements take on a new forlorn connotation. What that meaning is, I can't say, but it feels important.
On iTunes: James Blake / "Limit to Your Love"