If I had not gone out with Albertine on her long drive, my mind would stray all the farther afield, and, because I had refused to savour with my senses this particular morning, I enjoyed in imagination all the similar mornings, past or possible, or more precisely a certain type of morning of which all those of the same kind were but the intermittent apparition which I had at once recognised; for the keen air blew the book open of its own accord at the right page, and I found clearly set out before my eyes, so that I might follow it from my bed, the Gospel for the day. This ideal morning filled my mind full of a permanent reality, identical with all similar mornings, and infected me with a cheerfulness which my physical ill-health did not diminish: for, inasmuch as our sense of well-being is caused not so much by our sound health as by the unemployed surplus of our strength, we can attain to it, just as much as by increasing our strength, by diminishing our activity. The activity with which I was overflowing and which I kept constantly charged as I lay in bed, made me spring from side to side, with a leaping heart, like a machine which, prevented from moving in space, rotates on its own axis.