> Here’s a suitable analogy: it’s like the difference between having a center of mass behind the center of pressure, and a center of mass in front of the center

> Here’s a suitable analogy: it’s like the difference between having a center of mass behind the center of pressure, and a center of mass in front of the center of pressure. This "analogy" is more abstract than the original statement and is only going to make sense to someone who more-or-less also understands that one. How about “it’s like pulling a floating balloon by a string vs. pushing the balloon from the side and trying to keep it moving in a straight line in both cases” Or maybe “it’s like balancing a vertically-oriented baseball bat while holding it at the top vs. balancing a broom while holding it at the bottom.”