A viewer asks: “How might one live fully in later life, learning from regrets and disappointments and accepting limits and mortality, while aiming to cultivate resilience, gratitude, and wisdom in the face of life’s narrowing possibilities?”

We would simply point to wisdom previously imparted through the Divine Principles for Living. That is our basic outline and premise you can follow in working on any goal, including the broadest of needs to live a life of purpose and fulfillment. That will not happen to the extent you cannot remain in divine alignment, in ways that will pay off from your efforts helping you to stay in divine alignment and gain rewards from doing so. What you list in your question as the most desirable things to cultivate are actually soul attributes, and it is through divine alignment any area of weakness or shortcomings will get worked on and enable making spiritual progress that will pay off in many ways of practical significance.