Third movement of Mahler's Ninth, followed by all of his Eighth ("Symphony of a Thousand"). Dudamel's monster performance of the latter, over 1,400 singers and instrumentalists, is on YouTube in two parts.
Mahler's Ninth is a meditation on his approaching death. The third movement (=rondo, burlesque=) gives me the impression of a man holding a drinking party on his way to the gallows. It is great for clearing your head.
The Eighth, unlike =anything= Mahler ever wrote, is a massive affirmation of the human spirit, and something more. Music may never sound the same again.
As long as my experience can be summed up in words, I write no music about it. My need to express myself musically, symphonically, begins where the dark feelings hold sway, at the door which leads to the other world, the world where things are no longer separated by time and space.