Limits within these lines, strict syllabic counting:
pendulum swining
"Why do apple blossoms always have five petals? Only children ask such questions. Adults pay little attention to such things, taking them for granted, like the fact that we use only as many numbers as we can count on our ten fingers. When we look deeply into the patterns of an apple blossom, as seashell, or a swinging pendulum, however, we discover a perfection, an incredible order, that awakens in us a sense of awe that we knew as children. Something reveals itself that is infinitely greater than we are and yet part of us; the limitless emerges from limits."
Gyorgy Doczi
The Power of Limits; Proportional Harmonies in Nature, Art and Architecture