Something similar is experienced by humans shuffling and changing their commitments and activities – or- accelerating in their frames of happiness.
A relative experience point of view, because happiness is so important to the brain, that instead of demanding fixed requirements of input and feedback of activities for happiness, the brain would adapt to have its own reference of happiness to each individual.
I believe that’s the reason children can adapt through tough psychological environments at the cost of whatever they become later on in life.
Due the facts that all human brains are limed and similar, also due the universe entropy and life randomness, the human brain adapts to develop two types of experiencing happiness imagined as Sinusoidal waves:
First rule, is that happiness occurs and would only gravitate to its receivers.
Second rule, is that it doesn’t affect or matter to anything or anyone but the receiver.
The two types are, in summary:
1- Expected satisfactions
2- Satisfying expectations.
The first is outward driven but not healthy while the second is self driven and is what I think is one of nature’s best gifts that are free to grab once seen.
The first one experiences, proportionally with demands, extreme ends of cyclical bipolarism of hardily-climbed euphoria and sharply-inclined depressions.
The second one experiences, mildly with acceptance (lack of demands), leveled emotions of satisfactions ( happiness) and ambitions ( sadness and invested emotions). In other words you will not feel too sad if you were not trying too hard to be happy.
You don’t decide where you are on the map, or where you were born, but you control the direction of what you want to do next.
The brain is so good at surviving. It does so by shaping the interactions that result in happiness redefining what they are and how they are triggered. That does not mean however this does not happen with a cost later. See in the pictures above, the cost of handling more stressful events in life will result in more frequent shortly-lived acute changes and levels of sadness and depressions as well as highs of relief and happiness. It’s simple math, your brain will be twice as happy and twice as stressed completing two tasks than one. The higher the number and difficulty of demands and goals, the bigger the cost of stress and relief will be.