From Latin final, the purpose is the end with which something is done . Its about "why" what Explain or justify the reasons for a action. For example: “With this research, my purpose is to discover the behavior of people in stress situations”, “Everything we do has a purpose, but that purpose does not justify any behavior”, “What is your purpose with all this? Do you want to hurt me? ”.

The notion of purpose can be associated with concepts such as goal or objective . The purpose is what you aim for or that you want to achieve. It is an engine that drives animals to carry out various actions or to project in the short or long term.
When a specific action is carried out that has a short-term purpose, it is generally not accompanied by other actions, since the objective is usually not difficult to achieve, or it requires a preparation previous of varied duration, but that should not be repeated every time it is intended to obtain the same results. A common example is the performance of a musical piece by a trained professional: although it may be a work of great virtuosity, the study of it takes place in a process prior to the interpretation.
Taking the same situation, if we are located at the moment in which the person decides to start studying said musical piece, the purpose of such a challenge can be achieved in the long term, and several complementary actions will be necessary to overcome each phase with success (A first reading of the work, practices focused on the most complex parts, refinement of the tuning and learning of new techniques that may be useful, among many other possibilities).
Ultimately, all actions have a purpose, even everyday or the simplest. The purpose of feeding is to nourish the organism, although it can also look for the pleasure of eating foods that are to our liking. Sleep also has a purpose (regain strength). In any case, there is usually talk of purpose to mention more complex and conscious actions that merit an explanation or justification.
However, there are those who passionately seek a purpose for each action they perform, refusing to live spontaneously even those moments generally related to leisure. The concept of perfectionism is closely linked to this obsession with finding a reason for each phenomenon, for each event, with the objective of being able to control them in order to avoid potential errors and unexpected events.
According to the degree of perfectionism, the possibility of being frustrated by failure can be so great that it leaves no room for relaxation. When any decision must have a purpose of weight, life becomes a minefield, a track full of unpredictable obstacles and a wide range of difficulty, so that blinking without having planned before may be enough reason to crumble our entire structure.
There are those who affirm that human beings are the only animals capable of reasoning and making complex decisions, alien to our instincts; according to this point of view, the rest of the species go through the lifetime doing what their genes dictate, without the possibility of finding new and unique goals for each individual. On the other hand, both scientists and people living with nonhuman animals They say that reality is very different.
The philosophy considers that the purpose is the tendency towards an end of a given object . There are trends found according to the philosophical school, since some positions hold that living beings and nature have no purpose.
For him determinism , all physical events (including thinking) are causally determined by a relationship of cause and consequence. This implies that the future is potentially predictable according to the terms of the present