Modern humans probably have a more spontaneous relationship with the straight line than with the curve. Daily encounters with level ground and with all kinds of constructions are primarily based on the two princi- ples of horizontal and vertical. We appreciate rounded forms with the senses rather than the mind. It should, however, be noted that there is a tendency to turn to softer and more humanistic forms in furniture and building - also in the aerodynamic forms of transport in aircraft, cars, etc. There is an effort to habituate humans to a new expression of their environment, but only the future will tell whether it makes them feel more free and secure or, on the contrary, more restricted. In the circle, the viewer encounters the line with eternal recurrence, neither beginning nor ending, and going around an invisible but very precise centre. This compares with the idea of the course of time, which comes from nowhere and has no end.