Personalism is a philosophical school of thought searching to describe the uniqueness of 1) God as Supreme Person or 2) a human person in the world of nature, specifically in relation to animals. One of the main points of interest of personalism is human subjectivity or self-consciousness, experienced in a person's own acts and inner happenings—in "everything in the human being that is internal, whereby each human being is an eyewitness of its own self".
Other principles:
According to idealism there is one more principle
George Berkeley (1685–1753) was the first philosophical personal idealist. He completely denied the substantial reality of the material world, reducing it to a series of presentations produced in finite minds by the Infinite. To God and to souls alone did he ascribe metaphysical reality. All reality consists of active spirits and their perceptions or passive ideas. There is no unconscious material substance (esse est percipi). Material substance is unverifiable. Nature exists only in spirits, primarily in the Divine Spirit or Person, and then is communicated as “a divine language” to human spirits. In describing the material world as the divine language G. Berkeley combined Christian theism with metaphysical Idealism. His system was, in the strict sense of the term, a personal idealism.
Immanuel Kant (1724–1804) influenced American personalism under three headings: the theory of knowledge, ethical theory, and the primacy of practical reason. Personalism owes much to Kant’s theory of knowledge. The central aspect of his theory is the activity of the mind. By this doctrine of the creative activity of thought, Kant gave to the spiritual individualism of Leibniz and Berkeley a definiteness of content that it had previously lacked, and also supplied it with a firm epistemological basis.
Nikolai Alexandrovich Berdyaev (1874–1948) was a Russian religious and political philosopher who emphasized human freedom, subjectivity and creativity.
Socrates (469–399 B.C.) is praised for having taken philosophy seriously as the search for truth by which to live, even at the cost of his life, and opposed moral relativism by a critical, rational method which combined an ethics of satisfaction and an ethics of reason. He discovered the soul or self as the center from which sprang all human action.