It's difficult for me to think about. I rerun the scenario in my head. Very emotional. So much so that I can't really think about it. It kind of implodes. What can you think about that besides anger, sorrow? Like any bereavement, the only way out is to remember how good it was with John. Because I can't get over the senseless act. I can't think about it. I'm sure it's some form of denial. But denial is the only way that I can deal with it. -Paul McCartney 

Think of me every now and then, old friend. -John Lennon's last ever words to Paul