Understanding the Bethe Law, so that your efforts do not lose value

Have you ever experienced this: at first, the other person is overwhelmed with gratitude for your help, but gradually, the things you do out of habit are taken for granted. Once you fail to respond promptly, they complain as if you’ve changed. This phenomenon seems like human indifference, but behind it lies a psychological principle—the Law of Habituation. Understanding this law can help you solve many interpersonal dilemmas.

Why Your Kindness Is Taken for Granted

The core of the Law of Habituation is simple: everyone has an “adaptation period” for stimuli. When first exposed to a stimulus, the brain reacts strongly; but if the same stimulus repeats, the brain gradually “gets used to it,” and the response weakens.

This isn’t about people becoming cold, but a self-protection mechanism of our brains. Psychologists call it “stimulus adaptation.” Imagine if you remained highly sensitive to every good thing—your cognitive resources would be exhausted. The brain needs to distinguish between “normal” and “abnormal” to function efficiently.

For example, if a friend gives you a gift for the first time, you might be so happy you can’t sleep; the second time, you’ll still be surprised; but if they do it every week, by the tenth time, you might just politely thank them. The gift hasn’t changed, but your feelings have—this is the Law of Habituation at work.

The same logic applies to giving. When you help someone frequently, they initially feel grateful; but as help becomes more common, your kindness shifts from a “special favor” to an “expected duty.” That’s why some people say, “You used to be so good to me, but not anymore”—it’s not that you’ve changed, but that they have “gotten used to” your kindness.

The Neuroscientific Truth Behind the Law of Habituation

From a neurobiological perspective, this is all related to dopamine. Dopamine is the neurotransmitter responsible for reward and pleasure in the brain. When you do a good deed or are treated kindly, your brain releases dopamine, creating a feeling of happiness.

But here’s a key point: your brain has a powerful “predictive learning ability.” Once it recognizes a behavior pattern that brings rewards, it begins to “expect” that reward rather than be surprised by it. As a result, when the reward actually occurs, dopamine release decreases significantly.

This also explains why the honeymoon phase of love is often short-lived. At first, every gesture from your partner makes your heart race; over time, the same actions produce diminishing stimulation.

In economics, there’s a similar concept called “diminishing marginal utility”—initial investments yield high returns, but each additional unit produces less benefit. The Law of Habituation is a psychological reflection of this principle.

Classic Experiment: How Weights Reveal the Secrets of Feelings

Psychologist Alfred Babb conducted a famous weight experiment. He asked participants to hold a 400-gram weight; when he added 5 grams to make it 405 grams, most could immediately feel the increase in weight. But if they started with a 4000-gram weight and added 5 grams to make 4005 grams, almost no one noticed the difference.

What does this tell us? Feelings are not absolute but relative. The perception of intensity depends on the “reference point.” The same change can produce very different perceptions depending on the baseline.

A 2016 study published in the British Journal of Psychology further confirmed this. Researchers gave participants rewards (like small gifts or positive feedback) at different frequencies. The results showed that no matter how good the reward, high-frequency repetition led to a rapid loss of “novelty.” Conversely, reducing the reward frequency made the same reward more valued.

This finding is startling—sometimes, “less” is “more.”

Three Ways to Make Kindness Appreciated Again

Now that you understand the Law of Habituation, how can you apply it to relationships?

Method 1: Deliberately Control the Frequency of Giving

Don’t give everything unreservedly from the start. Especially in new relationships, low-frequency but high-quality acts of kindness are more likely to be appreciated than constant, predictable gestures.

For example, when a friend asks for help, occasionally step in proactively, and sometimes say, “This time is a bit inconvenient, but I’ll do my best next time.” This unpredictability can rekindle their “expectation”—and anticipation is a key source of emotional connection.

Method 2: Create Variations to Break Mechanical Repetition

The brain loves surprises. Instead of mechanically repeating the same kindness, periodically change how you show care. Maybe last time you helped directly; this time, offer advice. Maybe last time you accompanied them in person; this time, send a warm message.

This is especially effective in workplace motivation and maintaining parent-child relationships. If a leader rewards employees in the same way every time, effects diminish; but if the reward method varies, the impact remains stronger even if the reward itself is similar.

Method 3: Gracefully Set Boundaries

Every act of kindness should make the other person realize it’s not easy to come by. Setting boundaries may seem like “coldness,” but it actually maintains the emotional “threshold” for both parties.

Psychologist Timothy Wilson said: true long-term affection isn’t unconditional giving, but cherishing with boundaries. Occasionally saying “no” not only protects yourself but also keeps interactions fresh and respectful.

Inner Cultivation: Don’t Let the Law of Habituation Control Your Sense of Value

Many people, after learning about the Law of Habituation, first react by using it as a “defense weapon”—to explain why others no longer value them. But true wisdom isn’t about calculating others; it’s about examining and adjusting oneself.

First, stop attaching your worth entirely to others’ feedback. Others’ gratitude depends on their threshold, not the actual value of your help. The same act of kindness may be remembered lifelong by some, forgotten by others. That’s not your problem.

Second, give selectively. Invest your limited kindness and energy into those truly deserving, rather than indiscriminately spreading it everywhere. This makes each act more meaningful.

Finally, learn to regulate your own “sensitivity.” Be sensitive to those who are ungrateful, but also be dull to your own over-giving. This way, you maintain control over your interpersonal initiative.

By understanding and skillfully applying the Law of Habituation, your relationships become clearer—no longer troubled by meaningless feelings of unappreciation, nor hurt by others’ indifference. Every act of giving becomes a conscious choice, not a passive habit. Only then can you truly master the art of giving.