Because I still have so much shame. I’m full to the brim with it; I’m spilling over. I can look at my data again and again. I can look at scan after scan of drug-addicted brains shot through with holes, Swiss-cheesed, atrophied, irreparable. I can watch that blue light flash through the brain of a mouse and note the behavioral changes that take place because of it, and know how many years of difficult, arduous science went into those tiny changes, and still, still, think, Why didn’t Nana stop? Why didn’t he get better for us? For me?