Human beings are nothing more than chemical machines dressed in the clothing of civilization. Drinking a cup of warm water when anxious, taking ten deep breaths, can immediately trick the chaotic nerves; just staring at green plants for a while can drop cortisol levels by 37%; switching the phone to grayscale mode and wearing a sleep mask before bed can quietly turn off the switch of irritability. Never underestimate these tricks that seem to be soothing like child-rearing; it is precisely these physiological loopholes that allow us to barely live like human beings in the concrete jungle and fast-paced modern society.