The Gaia Instinct comes from the most primordial and powerful force in femininity, and one which has no language and not many stories to it, because she is Mother Earth, herself. She gives birth to the hills and the sky without a father, and mates with her equal, Uranus, the sky, to form everything else. To women today, this is her unique connection to nature and to the most primitive wisdom and knowledge of literally "giving birth." It relates to creation of works of art on one level, but is best understood as the wisdom that comes from the literal experience of giving physical birth to a child - a deeper knowledge that predates Hera, and such other figures as Eve.
After Chaos, Gaia (Earth) arose to be the everlasting seat of the immortals who possess Olympus above, and the depths of Tartarus below (as some scholars interpret it). He then tells that Gaia brought forth her equal Uranus (Heaven, Sky) to "cover her on every side" and to be the abode of the gods. Gaia also bore the hills, and Pontus(Sea), "without sweet union of love" (i.e., with no father). Afterwards with Uranus she gave birth to the Titans.
The power of this instinct is seen in other instincts - after all, she is their predecessor. The ways of Psyche in solving problems by "letting nature take its course," in her many tests and tribulations she encountered, Gaia was in the answers and forces that came to assist her. The goddesses Hera, Athena, Artemis, Hestia, Aphrodite all owe a debt to their distant matriarch, Gaia, whose principle might be summarized in the "trust of letting Nature take her course."