When we are sensitive and want to do good, we are on a kind of motivational high, euphoria. We feel our usefulness, busyness, which means we get rid of loneliness. Charitable activity gives us a new circle of communication, which, as we know, becomes rarer with age. Thus, sensitivity allows us to regulate our mood, the volitional component of the personality, increases vital energy, and has a positive effect on the production of the hormone serotonin. If there is not enough serotonin in the body, it leads to depression. Serotonin affects emotional stability and susceptibility to stress in humans, serotonin is normal, it easily copes with stressful situations. And, on the contrary, if the level of serotonin is reduced, then any little thing can lead such a person out of normal balance.