“Straight is the line of Duty, Curved is the line of Beauty, Follow the straight line, thou shall see. The curved line ever follow thee.”

“Human knowledge is not (or does not follow) a straight line, but a curve, which endlessly approximates a series of circles, a spiral. Any fragment, segment, section of this curve can be transformed (transformed one-sidedly) into an independent, complete, straight line, which then (if one does not see the wood for the trees) leads into the quagmire, into clerical obscurantism (where it is anchored by the class interests of the ruling classes).”

“A Curve does not exist in its full power until contrasted with a straight line.”

“If the old man looked at straight lines to keep his act together, I was going to stare at curved lines and go down in flames.”

“What is straight? A line can be straight, or a street, but the human heart, oh, no, it's curved like a road through mountains.”

“Following straight lines shortens distances, and also life.”