Jung on when Feeling suppresses Thinking:
Classics in the History of Psychology -- Jung (1921/1923) Chapter 10
Psychological Types
C. G. Jung (1921)
Translation by H. Godwyn Baynes (1923)
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Fe: We have already seen that the extraverted feeling type, as a rule, represses his thinking, just because thinking is the function most liable to disturb feeling. Similarly, when thinking seeks to arrive at pure results of any kind, its first act is to exclude feeling, since nothing is calculated to harass and falsify thinking so much as feeling-values.
Thinking, therefore, in so far as it is an independent function, is repressed in the extraverted feeling type. Its repression, as I observed before, is complete only in so far as its inexorable logic forces it to conclusions that are incompatible with feeling. It is suffered to exist as the servant of feeling, or more accurately its slave. Its backbone is broken; it may not operate on its own account, in accordance with its own laws, Now, since a logic exists producing inexorably right conclusions, this must happen somewhere, although beyond the bounds of consciousness, i.e. in the unconscious. Pre-eminently, therefore, the unconscious content of this type is a particular kind of thinking. It is an infantile, archaic, and negative thinking.
So long as conscious feeling preserves the personal character, or, in other words, so long as the personality does not become swallowed up by successive states of feeling, this unconscious thinking remains compensatory. But as soon as the personality is dissociated, becoming dispersed in mutually contradictory states of feeling, the identity of the ego is lost, and the subject becomes unconscious.
But, because of the subject's lapse into the unconscious, it becomes associated with the unconscious thinking -- function, therewith assisting the unconscious [p. 452] thought to occasional consciousness. The stronger the conscious feeling relation, and therefore, the more 'depersonalized,' it becomes, the stronger grows the unconscious opposition. This reveals itself in the fact that unconscious ideas centre round just the most valued objects, which are thus pitilessly stripped of their value. That thinking which always thinks in the 'nothing but' style is in its right place here, since it destroys the ascendancy of the feeling that is chained to the object.
Unconscious thought reaches the surface in the form of irruptions, often of an obsessing nature, the general character of which is always negative and depreciatory. Women of this type have moments when the most hideous thoughts fasten upon the very objects most valued by their feelings. ...
Fi: So long as the ego feels itself housed, as it were, beneath the heights of the unconscious subject, and feeling reveals something higher and mightier than the ego, the type is normal.
The unconscious thinking is certainly archaic, yet its reductions may prove extremely helpful in compensating the occasional inclinations to exalt the ego into the subject. But, whenever this does take place by dint of complete suppression of the unconscious reductive thinking-products, the unconscious thinking goes over into opposition and becomes projected into objects. Whereupon the now egocentric subject comes to feel the power and importance of the depreciated object.
Consciousness begins to feel 'what others think'. Naturally, others are thinking, all sorts of baseness, scheming evil, and contriving all sorts of plots, secret intrigues, etc. To prevent this, the subject must also begin to carry out preventive intrigues, to suspect and sound others, to make subtle combinations. Assailed by rumours, he must make convulsive efforts to convert, if possible, a threatened inferiority into a superiority.
Innumerable secret rivalries develop, and in these embittered struggles not only will no base or evil means be disdained, but even virtues will be misused and tampered with in order to play the trump card. Such a development must lead to exhaustion. The form of neurosis is neurasthenic rather than hysterical; in the case of women we often find severe collateral physical states, as for instance anæmia and its sequelæ...