In modal logic, an accessibility relation is a binary relation, written as between possible worlds.
Read more about Accessibility Relation: Description of Terms, Basic Review of (Propositional) Modal Logic, The Four Types of The 'Accessibility Relation' in Formal Semantics, Comment About The 'Accessibility Relation', Philosophical Applications, Computer Science Applications
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“The psychoanalysis of individual human beings, however, teaches us with quite special insistence that the god of each of them is formed in the likeness of his father, that his personal relation to God depends on his relation to his father in the flesh and oscillates and changes along with that relation, and that at bottom God is nothing other than an exalted father.”
—Sigmund Freud (1856–1939)