There are some pictures that we develop very much, by keeping them much before us, the pictures of the enemies, for instance, or of the friends of whom we often think. Some pictures are very little developed. They just come and go. That is why, in the dream, sometimes we see the faces of our friends, just as they are, sometimes we see forms that seem familiar, but we do not recognize them, sometimes we see pictures that seem quite strange. Two or three of the pictures that are little developed join and form one picture, which seems familiar.