The essence of romantic romanticism first appeared in Germany and the UK in the 1770s, which resulted from the entanglement of the 18th century ideas and concepts known as enlightenment. This movement hit Europe like a candle in a hay barn, and in the 1920s its widespread flames hit France and other Europeans followed it. Although the 18th century generally focused on reason and judgment, law and order, and social value, romanticists emphasized imagination, emotion, freedom, personal value, nature, distance, forgotten times.
The general concept of essence is as follows. Essence is a definable property of what exists. At that time, the essence of things was its definition. So the current problem is how the essence of things is related to their existence. There exists essence in a limited entity, but it does not exist; this is a rough explanation of Thomas' most fundamental metaphysical doctrine: essence and existence are different in a limited entity. Therefore, considering the nature and existence of Thomas' metaphysical thinking, he will consider his basic doctrine, that is, essence and existence are completely different.
Existentialism was founded by Jean-Paul Sartre, supporting Martin Heidegger's claim that mankind existed before nature. "Essence" is the cornerstone of all metaphysical philosophy and rationalism, but the statement of Sartre is the denial of his previous philosophical system (in particular the philosophical system of Husserl, Hegel and Heidegger). Rather than creating "reality" he believes that existence and reality are first and that essence is later. The most important thing for Kierkegaard is that the moral entity is an individual and the subjective aspect of human life is the most important, and for Kierkegaard all of them have a religious connotation .
The assertion that existence precedes essence is that assertions do not have such predefined qualities in humans and the essence of individuals is defined by individuals through individuals creating and living their lives . As Sartre said, existentialism is a sort of humanitarianism: "People exist first, encounter, rapidly increase in the world, and later define themselves." Existentialism tends to focus on the issue of existence of human beings and the conditions of existence. Being a person means each person's specific life and the specific way they are in the world. The existence of this particular individual must be the main source of information in people's research, but certain conditions are often considered "local" to the existence of human beings.