We pretty much mourn for ourselves, not for him. I get the sense he didn't really want to be here for that much longer. Like Kurt Vonnegut. You tell the truth for that many years and live long enough to see that truth pretty much ignored outside your immediate circle of influence (i.e., fans), you're going to get bitter. Carlin's stuff had become nihilistic and angry in the past decade or so. Again, like Vonnegut. With both, you see a definite journey over the decades from whimsical observation to get-off-my-lawn everything-sucks let's-just-drop-the-fucking-bomb-and-get-it-over-with.
We're selfish. We wanted Vonnegut and Carlin to live forever so they could articulate our fear and loathing more eloquently than we ever could. But they're both in a better place now. Meaning, not here. Not among the idiots, the ones who run things and keep people stupid. Not in the Idiocracy.
Who will be the next Vonnegut, the next Carlin? There won't be. There will be someone entirely different who, like Vonnegut and Carlin, will carry on in the tradition of Mark Twain. (Who was also a bitter bastard towards the end.)
Carlin wouldn't have wanted bathetic mourning and tributes. He wouldn't have wanted to hear 'Oh, whatever shall we do without your voice to guide us?' What he would've wanted was for us to get off our asses, think for ourselves, question authority, question everything, question ourselves. Take a moment today to challenge a dearly held opinion of yours. Imagine Carlin pissing all over it. If you can't bring yourself to do it, you're part of the problem he railed against for forty years.