While many are mourning MCA aka Adam Yauch, his fellow Beastie Boys have obviously been among the hardest hit by the rapper/activist’s tragic passing.

Beastie Adam ‘Ad Roc’ Horovitz recently posted a message of thanks to the band’s tumblr, along with the above pic, saying:positive human being. He is someone we can learn from, and are continuously inspired by.

We miss you, MCA! Your memory lives on...