|The concepts of stability and agility keep coming up in my life for whatever reason. In the world of aerospace engineering, you can design a really stable passenger airplane by giving it nice big wings and balancing the weight properly so it adapts to changes in the air in a predictable, linear manner. Or you can design an agile fighter jet by balancing the weight almost improperly and giving it the ability to turn quickly (and fail spectacularly if anything goes wrong). Stability and agility are on opposite ends of a spectrum. You can design something to fall somewhere in the middle of the line depending on your needs, but you can't have a strong combination of both aspects.