The choice of nutrition; the choice of climate and place: the third point at which one must not commit a blunder at any price is the choice of one’s own kind of recreation. Here, too, depending on the degree to which a spirit is sui generis, the limits of what is permitted to him, that is, profitable for him, are narrow, quite narrow. In my case, every kind of reading belongs among my recreations – hence among the things that liberate me from myself, that allow me to walk about in strange sciences and souls – that I no longer take seriously. Reading is precisely my recreation from my own seriousness…

Should I permit an alien thought to scale the wall secretly? – And that is what reading seriously would mean.