It is the idea that if you reach professional heights and are deeply invested in being high up, you can suffer greatly when you inevitably decline.

In many professions, we may reject the inevitability of decline before a very old age. But the data are clear that for most people, in most fields, decline starts earlier than expected. According to research, success and productivity increase for the first 20 years after the inception of a career. If you start a career at 30, your best work will be produced around 50, and decline after that.

Some people have managed their declines well.

When the musical career of Johann Sebastian Bach declined, instead of becoming depressed or discouraged, he chose to redesign his life, moving from composer to instructor. In his later years, he lived a quieter life as a teacher and family man.

• Fluid intelligence is the ability to reason, analyze, and solve unique problems. It is highest in early adulthood and diminishes in one's 30s and 40s.
• Crystallized intelligence is the ability to use knowledge gained in the past. It relies on accumulated knowledge, tends to increase through one's 40s, and does not diminish until very late in life.

Careers that rely on fluid intelligence tend to peak early, while those that use more crystallized intelligence peak later. Profound insights tend to come from those in their 30s and early 40s. The best explainers of complicated ideas tend to be in their mid-60s unto well into their 80s.

Many wealthy people keep on working to increase their wealth far beyond what they could possibly spend. They often do it because they get a sense of self-worth from it. However, focusing on acquisition leads to attachment and vanity, which derails the search for happiness.

Instead of acquiring more, we should strip things away. Our lives are not a canvas to fill, but more like a block of marble to chip away and shape something out of. Each year's goal should be to throw out things and obligations until a refined self is revealed.

There are two kinds of virtues:

• Résumé virtues. These are professional and geared toward worldly success.
• Eulogy virtues. These are ethical and spiritual. They are what you want people to talk about at your funeral. "He was kind and deeply spiritual," not "He made senior vice president and had a lot of frequent-flier miles."



We live a most fulfilling life, especially when we reach midlife, by pursuing virtues that are meaningful to us.

Acceptance of the natural cadence of our abilities allows the shifting of attention to higher spiritual and life priorities.

• Jump: Let go when you have reached your peak accomplishment, perhaps before you are completely ready. You don't necessarily have to quit your job, but be content to walk into the next stage of life.
• Serve: Move from activities focused on the self to activities focused on others. Focus on teaching or mentorship, sharing ideas in the service of others.
• Worship: Bach said that "the aim and final end... should be none other than the glory of God and the refreshment of the soul." Whatever your metaphysical convictions, refreshment of the soul can be the aim of your work.
• Connect: Happiness is directly tied to one's relationships. Dedicate more time to relationships, and less to work.