In modern psychological terminology there are many definitions that we do not fully understand. Some have a historical origin, based on the experience gained in the war, in the negotiations; others come from philosophical teachings, therefore they exist outside of time and space. Well, let's deal with some of them.
Rationalism is a worldview that is fully based on an objective perception of the environment. As you know, everything that exists in our world closely interacts with each other. This is manifested in relations between people (business, official, hostile, etc.), in friendship with animals, in interaction with flora, as well as with objects of inanimate nature (water, gas, oil, air). In this context, rationalism is a sound assessment of the qualities and properties of each of the above elements, on the basis of which a particular subject performs his actions in relation to something or someone.
In this definition, the concept of impartiality occupies the main place. A rational person does not feel love for the beautiful, and in exactly the same way, cruelty is not characteristic of him. He cuts off from his consciousness any habits imposed by culture, does not obey customs (most often the most ridiculous), is not involved in religion. Rationalism is prudence, it is knowledge of the world through its study. It is based entirely on facts, not on spiritual impulses and prophecies.
To make it clearer, let's provide examples of people who are rationalists. Among them, the overwhelming majority are skeptics who are convinced of the complete materiality of our world. All scientists, since the time of the existence of the Sumerians, were staunch rationalists. Today, their “kind” continues and replenishes, and, it is worth noting, so far all scientific dogmas have shown us their veracity. There are also "ignorant" rationalists - these are agnostics, perfectionists, materialists.
Now let's try to reveal the principle of rationalism, which will let us understand the essence of the subject. Firstly, it lies in the knowledge of the world through experience, research, experiment, which is carried out on the material level. Everything that is visible and tangible exists, and that which cannot be said so simply does not exist. Secondly, the world consists of material elements. Even the air is filled with atoms and molecules that function in a certain order. Chaos is unacceptable to rationalism, unlike poetry, music and other "ephemeral" arts and teachings.
A special place in our world isphilosophical rationalism. Any skeptic will immediately say that such a term is absurd, since philosophy is characterized by a certain mysticism, obsession with experiences, subjectivity, that is, everything that is opposite to the material worldview. However, today even this science has been able to rationalize its currents, divide them and concretize them. Each ethnic group has its own philosophy, so to speak, a common one, which determined the spiritual orientation of the people and morality. In turn, each individual family and each individual has “his own” philosophy.
To put it generally, we can say that rationalism is a worldview that is inherent only to rational people. It is also worth emphasizing life experience, which often shows that each of us is the sole master of our own destiny, our environment - both spiritual and material.