Besides biological homeostasis, there is another opponent in your head: energy-saving mode. Although your brain makes up only about 2% of your body mass, it consumes around 20% of your energy. To be efficient, the brain loves automation.
Every habit is like a well-paved highway in your mind—neurons fire quickly and effortlessly. A change, on the other hand, is like having to hack your way through a dense jungle with a machete to forge a new path. That is exhausting and consumes a vast amount of energy.
That’s why change often feels not just psychologically, but physically draining. Your brain sends signals of fatigue and resistance ("Let's just take the highway!"), not because the change is bad, but because it is metabolically expensive. The paradox is essentially a battle between energy efficiency and innovation.