One can think of a secretary actively operating a filing system, of a librarian actively cataloguing books, of a computer actively sorting out information. The mind however does not actively sort out information. The information sorts itself out and organises itself into patterns. The mind is passive. The mind only provides an opportunity for the information to behave in this way. The mind provides a special environment in which information can become self-organising. This special environment is a memory surface with special characteristics.