The human being needs 'reasons' to act, desires, illusions and objectives that give meaning to his life. Depression is reached, and once we arrive, we remain in it due to apathy, reluctance, disappointment and a lack of meaning in our lives that seems 'vegetative', absurd.
Depression can make us want to get away from family, friends, work, and school. It can also cause us anxiety, loss of sleep, appetite, and lack of interest or pleasure in doing different activities.
The irritation produced by the smallest or ugly incident triggers an excessive reaction in the depressed person. If the person, before becoming depressed, was well educated, with moral principles and exemplary behavior, we will not see them as aggressive in the grossest sense of becoming intemperate and offensive, let alone go into the action of physically attacking. On the other hand, other depressed people, with difficulties prior to the depression of controlling their bad mood and who entered a rabid state at the first change, will duplicate these behaviors while being depressed, just as those same people tend to exceed themselves in altered states of consciousness such as being drunk or tired.