If one thing makes you think of another thing, you form a connection between them in your mind. The more connections you have, the better access you have to cross-connections. The more things something can remind you of, the more you know about it, or are learning about it.
"The fox knows many things, but the hedgehog knows one big thing." Isaiah Berlin
“Like Freud, Jung believes that the human mind contains archaic remnants, residues of the long history and evolution of mankind. In the unconscious, primordial "universally human images" lie dormant. Those primordial images are the most ancient, universal and "deep" thoughts of mankind. Since they embody feelings as much as thought, they are properly "thought feelings." Where Freud postulates a mass psyche, Jung postulates a collective psyche. “
Patrick Mullahy (b. 1912), U.S. psychoanalyst, philosopher. Oedipus: Myth and Complex, ch. 6, Grove Press (1948).
XIII. Archaic Remnants and Infantilism in the Dream. Sigmund Freud. 1920. A General Introduction to Psychoanalysis: "LET us revert to our conclusion that the dream-work, under the influence of the dream censorship, transforms the latent dream thoughts into some other form of expression. The latent thoughts are no other than the conscious thoughts known to us in our waking hours; the new mode of expression is incomprehensible to us because of its many-sided features. We have said it extends back to conditions of our intellectual development which we have long progressed beyond, to the language of pictures, the symbol-representations, perhaps to those conditions which were in force before the development of our language of thought. So we called the mode of expression of the dream-work the archaic or regressive."