In the top of the score of the "Emperor" concerto, Beethoven wrote "A song of glory for the battle". It can apply here also, as we hear Kleiber's performance.
Even if you know the DG recording, here everything is different. He takes everything even more far, taking all the melodies, the phrasing, the risks further and further. It's breathtaking and can show all the life and light this symphony has.
The Poco Allegretto (1st movement) and the Allegro. Finale are bursting with energy: Kleiber creates crescendos and flows of light that seem to open doors to the inner heart of a hero.
Even after Furtwängler's 1943 recording, even after Mravinsky or Gardiner, even after Toscanini or Scherchen, this is a revealing recording that you cannot forget. One of the best recordings of one of the biggest symphonies of all time.
Prepare yourself for battle.