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

“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.”

“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.”

“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).”

“Life should be a risk. It's more than a straight line that you can see clearly from one point to the other. It dips and curves and you never know what's around the bend sometimes until you get there. That scares a lot of people. But that's the beauty of it.”

“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.”