"It doesn’t matter how great your lead playing is—if your rhythm work sucks, you’re not gonna go very far. When you’re playing rhythm in a band like Metallica, what your right [picking] hand does is really important. Obviously, what your left hand is doing is pretty darned crucial too, but, as a lot of our riffs involve syncopated open-string notes and relatively simple-to-finger power chords, it’s often the right-hand picking and muting techniques that can make or break a song."
January 1, 1970
https://en.wikiquote.org/wiki/Rhythm_guitar