(25) ...the interaction of bending and the circle line...
a. ...the horse, which was made straight is bound to the straight line just as the properly bent horse follows the circle line...
b. ...the diameter of a circle is determined by the degree to which this line is curved. Equally the circular movement of a vehicle is determined by the angularity of its front steering bar...
Ouestions.
It looks like there is a serious flaw in Steinbrecht's perception and thinking here, which comes from envisioning the horse's curvature in terms of how an automobile functions. To stay with this image one could say the horse has a front and a back steering bar... I.e. it is capable of angularity in the shoulders and in the croup.
That is, in simple turns and shoulder-in type movements a line that connects both shoulders is angular to the direction of movement and hence front legs cross. In croup-in type movements a line that connects both hip bones is angular to the direction of movement and the hind legs cross.
On a circle, however, the line that connects shoulders and the line that connects hips both are angular. As Steinbrecht puts it, the inner legs draw near (see 24.c.)... The horse in horizontal balance thus centers on the rider, ...which is in keeping with the rest of what Steinbrecht says...
The above statement hence is misleading and factual only if the rider at all times keeps the horse on the inner hind leg and makes this leg the pivot and constant turning point... For good reasons, however, this is not what Steinbrecht suggests... even if the repeated mentioning of the inner hind leg's role in turning seems to imply so...