April 4. Left upper arm feels like I bumped it somewhere. It gets weaker as the day goes on. I slept well, a full six hours, but am still more tired than usual, taking another half hour here, another forty-five minutes there. I try to imagine the effect of the mRNA vaccine, but there is nothing special about it. Such and much more complicated processes happen in my body billions of times every second. And yet, I think it is the first time that we have fed something into this information circuit, a bit pattern that leads to corresponding processes. To be allowed to be present at this moment. To be part of this step. Isn’t that like the first stone tool?