If you are in passionate love and want to celebrate your passion, read poetry. If your ardor has calmed and you want to understand your evolving relationship, read psychology. But if you have just ended a relationship and would like to believe you are better off without love, read philosophy.

Moral matrices bind people together and blind them to the coherence, or even existence, of other matrices. This makes it very difficult for people to consider the possibility that there might really be more than one form of moral truth, or more than one valid framework for judging people or running a society.

A culture that allows the concept of “safety” to creep so far that it equates emotional discomfort with physical danger is a culture that encourages people to systematically protect one another from the very experiences embedded in daily life that they need in order to become strong and healthy.

With such a vast and wonderful library spread out before us, we often skim books or read just the reviews. We might already have encountered the Greatest Idea, the insight that would have transformed us had we savored it, taken it to heart, and worked it into our lives.

Aristotle asked about aretē (excellence/virtue) and telos (purpose/goal), and he used the metaphor that people are like archers, who need a clear target at which to aim.13 Without a target or goal, one is left with the animal default: Just let the elephant graze or roam where he pleases. And because elephants live in herds, one ends up doing what everyone else is doing. Yet the human mind has a rider, and as the rider begins to think more abstractly in adolescence, there may come a time when he looks around, past the edges of the herd, and asks: Where are we all going? And why?

The two biggest causes of evil are two that we think are good, and that we try to encourage in our children: high self-esteem and moral idealism. Having high self-esteem doesn’t directly cause violence, but when someone’s high esteem is unrealistic or narcissistic, it is easily threatened by reality; in reaction to those threats, people — particularly young men — often lash out violently.

Work on your strengths, not your weaknesses. How many of your New Year’s resolutions have been about fixing a flaw? And how many of those resolutions have you made several years in a row? It’s difficult to change any aspect of your personality by sheer force of will, and if it is a weakness you choose to work on, you probably won’t enjoy the process. If you don’t find pleasure or reinforcement along the way, then — unless you have the willpower of Ben Franklin — you’ll soon give up. But you don’t really have to be good at everything. Life offers so many chances to use one tool instead of another, and often you can use a strength to get around a weakness.

The effectance motive helps explain the progress principle: We get more pleasure from making progress toward our goals than we do from achieving them because, as Shakespeare said, “Joy’s soul lies in the doing.

[W]hen it comes to goal pursuit, it really is the journey that counts, not the destination. Set for yourself any goal you want. Most of the pleasure will be had along the way, with every step that takes you closer. The final moment of success is often no more thrilling than the relief of taking off a heavy backpack at the end of a long hike. If you went on the hike only to feel that pleasure, you are a fool.