Necessity not motivation

Humans are normal creartures, they need to set goals to their life, in order to be in a stable mental state.
First, an individual has to set a number of general goals to his life, in favor of being sane, else he will get lost in the path of depression, suicidal thoughts, and so. For instance, specialists witnessed wild animals get depressed as they get imprisoned, because, these animals have no longer a goal, after their life was dedicated to chasing a meal to survive, their meals now come right to them. Thus an objective of life is important.
Second, after setting a general goal, the individual must set small goals to his days, in a way that, these small goals serve the general one, another benefit of these small goals is that they keep the individual busy and improving constantly.