The mind is complex in its essence, because it consists of a colossal number of neurons, connections between them, electrical impulses running along them and hormones that trigger these impulses.
This machine almost never switches off and does not rest, it is greedy for information and its endless digestion. In its mirror labyrinth, everything gets complicated, while the blessed emptiness simply cannot be digested by the mind at all.
Что здесь общего в знаменателе? Конечно же, вы сами и ваши отношения с людьми. Это именно вы чувствуете весь этот набор эмоций по отношению к людям.
The third action of the mind is categorization. Friendship, work and love are completely different disciplines associated with completely different people. They work in different ways, there are different rules, motives and reactions, different meaning of the results for your life. Screwing something up at work is a survival threat. Problems with friends are not conducive to strengthening social hierarchical positions. Broken relationship with a partner lets our reproduction goals down the drain.