Carl Jung on “Incubation.”

It is the custom of the ancients, the tradition of the ancestors, observed since days of old. It is to be adapted for new use. It is practice and incubation in a smelter, a taking-back into the interior, into the hot accumulation where rust and brokenness are taken away through the heat of the fire. It is a holy ceremony, help me so that my work may succeed. ~Carl Jung, The Red Book, Page 345

It is a well-known fact that scenes of mystic union with the Saviour are strongly tinged with erotic libido. Stigmatization amounts to an incubation with the Saviour, a slight modification of the ancient conception of the unio mystica as cohabitation with the god ~Carl Jung, CW 5, Para 438

In the Anphiaraion at Oropos those healed through incubation in the temple threw their money-offerings into the sacred well. ~Carl Jung, CW 5, Para 571

Self-incubation, self-castigation, and introversion are closely related ideas. Immersion in oneself (introversion) is a penetration into the unconscious and at the same time asceticism. The result, for the philosophy of the Brahmanas, is the creation of the world, and for the mystic the regeneration and spiritual rebirth of the individual, who is born into a new world of the spirit. Indian philosophy also assumes that creativity as such springs from introversion ~Carl Jung, CW 5, Para 590

During the incubation of his illness the schizophrenic likewise turns away from the outer world in order to withdraw into himself, but when the period of morbid compensation arrives, he seems constrained to draw attention to himself, to force himself upon the notice of those around him, by his extravagant, insupportable, or directly aggressive behavior ~Carl Jung, CW 6, Para 859

Although the actual moment of conversion often seems quite sudden and unexpected, we know from experience that such a fundamental upheaval always requires a long period of incubation.  It is only when this preparation is complete, that is to say when the individual is ripe for conversion, that the new insight breaks through with violent emotion. Saul, as he was then called, had unconsciously been a Christian for a long time, and this would explain his fanatical hatred of the Christians, because fanaticism is always found in those who have to stifle a secret doubt. That is why converts are always the worst fanatics. ~Carl Jung, CW 8, Para 582

The Koran says of it: “You might have seen the rising sun decline to the right of their cavern, and as it set, go past them on the left, while they [the Seven Sleepers] stayed in the middle” The “middle” is the center where the jewel reposes, where the incubation or sacrificial rite or the transformation takes place. ~Carl Jung, CW 9i, Para 240

This “symptom” of transformation goes back to the old idea that the transformed one becomes like a new-born babe (neophyte, quasimodogenitus) with a hairless head. In the myth of the night sea journey, the hero loses all his hair during his incubation in the belly of the monster, because of the terrific heat ~Carl Jung, CW 11, Para 348

Since alchemy is concerned with a mystery both physical and spiritual, it need come as no surprise that the “composition of the waters” was revealed to Zosimos in a dream. His sleep was the sleep of incubation, his dream “a dream sent by God.” The divine water was the alpha and omega of the process, desperately sought for by the alchemists as the goal of their desire. The dream therefore came as a dramatic explanation of the nature of this water. The dramatization sets forth in powerful imagery the violent and agonizing process of transformation which is itself both the producer and the product of the water, and indeed constitutes its very essence ~Carl Jung, CW 13, Para 139

This is one way in which loss of energy may come about. The other way causes loss not through a malfunctioning of the conscious mind but through a “spontaneous” activation of unconscious contents, which react secondarily upon consciousness. There are moments in human life when a new page is turned. New interests and tendencies appear which have hitherto received no attention, or there is a sudden change of personality (a so-called mutation of character). During the incubation period of such a change we can often observe a loss of conscious energy: the new development has drawn off the energy it needs from consciousness. This lowering of energy can be seen most clearly before the onset of certain psychoses and also in the empty stillness which precedes creative work. ~Carl Jung, CW 16 Para 373