A severe obsessive-compulsive neurotic patient illustrated in analysis some of the meanings of obstinacy, a character trait which expressed itself in treatment as well as in every other area. The obstinacy was a general defensive reaction against passive submissive tendencies and also an unconscious expression of hostile aggression. The patient periodically indulged in limited homosexual activity. This was seen as an act of submission; the obstinacy was an undoing of this anxiety-provoking act. With the analyst, the patient was compliant and deferential but also revealed aggression and hostility by a quiet argumentativeness along with passive defiance in remaining impervious to interpretations. The pathologic character attitude of obstinacy is an order of defense against being subjugated to the will of others. It is the outcome of a defense which has engulfed the ego. The development of the defense into a character trait is indicative