Growing old is like a perennial battle against hubris. In your early twenties, you’d strike first and you’d strike anywhere. You are not bogged down by hypertension, migraines, lower back ache and all the other gifts of physiological aging that typically begin to happen sometime in midlife. It’s only in midlife where you learn how to optimize, declutter your time and energy and headspace, and begin thinking about other things like passing on good things to the next generation.