Nassim Taleb coined the term "antifragile" in his namesake book. Antifragility in a person or in a system is the ability to thrive as a result of negative factors, such as shocks, chaos, volatility, noise, mistakes, faults, attacks, failures, etc. All these negative factors can be put under one umbrella: stress. In that sense, the "right" amount of external stress can be hardly controlled by an individual. However, pulling in some Stoic wisdom, we can probably say that an individual can chose to react with the "right" amount of internal stress to any "wrong" amounts of external stressors. Did I get it right, James?