In his letter to FBI Philip K. Dick expressed the supposition that Stanislaw Lem “is probably a composite committee rather than an individual, since he writes in several styles”. This article refers in a way to the quoted, and treated as an anecdote, utterance. However, it doesn’t draw so far reaching conclusions from stylistic diversity – that permanent metamorphosis, mask reversal, how it was presented by Jerzy Jarzębski – texts of the author of Solaris. It makes the category of author – as bonding together Stanisław Lem’s works in a opus magnum – problematical. Simultaneously, it suggests the look at the subject of Polish writer’s texts as the subject of silva rerum, namely the one, who shapes himself and, at the same time, interprets himself in the act of “reading-writing”, rather than is given. The term “signature of silva rerum” seems to describe better the “unsystemic regularity” of Lem’s writings. Lem’s remark concerning his book Filozofia przypadku: “volume, in which everything only begins, promises, opens – but nothing closes or ends”, seems to refer also to his other works. The case is similar with the subject of Lem’s texts, who, admittedly, is the subject of a biography and autobiography but the subject, who only promises himself. Therefore, he merges but also disperses the work. This bidirectional process of closing and opening is the topic of this article.