Feeling lousy. Got confused over a trivial thing, and it ruined my mood for several days. In the morning we started manually pumping condensate from the water regeneration system, but it wouldn’t flow because the line was blocked. Turns out we hadn’t switched to the second manifold of the water regeneration system — we forgot to open it, and the radiogram missed that we’re on the second thermal regulation loop. Got caught on a simple thing. Couldn’t calm down all day. Went to bed — palpitations, sweating, couldn’t fall asleep; I thought my heart would give out — no, it held. I’m too impressionable. I feel these trifles gnaw at me and wear me down; they’ve become hard to bear, and there’s no one to share them with, as there would be on Earth.