You may want to familiarize yourself with the philosophy of Stoicism. It sounds very similar to what you describe. I’d recommend starting with a “sampler” like “The Daily Stoic,” by Ryan Holiday. Epictetus and Marcus Auralius are two of the biggest names in terms of “fathers” of this philosophy.
Don’t go by whatever impression Hollywood or society may have left you with about the word “stoic.” It doesn’t mean “without emotion.”
Epictetus was a slave most of his life and then banished at the end. I would disagree with the wealthy comment. Nelson Mandela embraced stoicism to get him through his prison term. I’m not sure where your perception comes from, but a major tenant is not putting emphasis on wealth or material goods.
ETA - my deleted comment above was just me moving this one down to be in the appropriate hierarchy.