The Endowment Effect is the psychological tendency to overvalue things simply because you own them.

A Ulysses Pact is a decision made in a clear-headed state that deliberately binds your future self against a predictable moment of weakness.

The Spillover Effect describes the phenomenon where behavior, emotion, or performance in one area of life bleeds—uninvited—into another.

Supercompensation is the physiological principle that the body doesn't just recover from stress, it recovers past its previous baseline.

Episodic Friendship is the recognition that not all meaningful relationships are meant to be continuous.

Temptation Bundling is the practice of pairing something you need to do but resist with something you genuinely enjoy.

Satori is a Zen Buddhist term for a sudden flash of awakening—a moment in which something is understood not gradually, but all at once.

The Sapir-Whorf Hypothesis proposes that the language you speak shapes your reality.

Akrasia is the ancient Greek term for acting against your own better judgment—doing the thing you know you shouldn't, or failing to do the thing you know you should.

Positive Sum Thinking is the belief that interactions, relationships, and deals don't have to produce a winner and a loser—that value can be created so that everyone walks away with more than they started with.

Amor Fati is the practice of not merely accepting what happens to you—good or bad—but actively embracing it as necessary and even good.

Beginner's Mind suggests approaching any subject with openness and curiosity, regardless of how much expertise you've accumulated.

Enoughness is the ability to recognize what you have, or have done, is sufficient.

The Stumble Heuristic is a simple rule for maintaining good habits through the inevitable interruptions of real life.

A wintering period is a stretch of life marked by retreat, difficulty, or dormancy—when progress slows, energy wanes, and outward growth pauses.

The Illusion of Effortlessness is the tendency to mistake polished outcomes for innate talent rather than hard-earned mastery.

Friluftsliv describes a philosophy of living in relationship with nature—not conquering it, escaping into it, or optimizing it, but belonging to it.

A liminal space is a threshold—an in-between state where the old has fallen away, but the new has not yet taken form.

The Progress Principle is the idea that making small, meaningful progress in work is the single most powerful driver of motivation and satisfaction.

Cathedral Thinking is the mindset of planning and acting on a timescale longer than one’s own lifetime.