Excerpts are below. 

Klein, Melanie (1975). Envy and Gratitude and Other Works, 1946-1963. (click preceding link for information on purchasing from Amazon). New York: A Delta Book.

4—Anxiety arises for the operation of the death instinct within the organism, is felt as fear of annihilation (death) and takes the form of fear of persecution. The fear of the destructive impulse seems to attach itself at once to an object—or rather it is experienced as the fear of an uncontrollable overpowering object.

6—The first internal good object acts as a focal point in the ego. It counteracts the processes of splitting and dispersal, makes for cohesiveness and integration, and is instrumental in building up the ego. Projection originates from the deflection of the death instinct outwards and it my view it helps the ego to overcome anxiety by ridding it of danger and badness.

13—The need to control others can to some extent be explained by a deflected drive to control parts of the self. When these parts have been projected excessively into another person, they can only be controlled by controlling the other person.

30—The threat to the self from the death instinct working within is bound up with the dangers apprehended from the internalized devouring mother and father, and amounts to fear of death.

181—Envy is the angry feeling that another person possesses and enjoys something desire, the envious impulse being to take it away or to spoil it. Greed is an impetuous and insatiable craving, exceeding what the subject needs and what the object is able and willing to give. At the unconscious level, greed aims primarily at completely scooping out, sucking dry, and devouring the breast.

183—The first object to be envied is the feeding breast, for the infant feels that it possesses everything he desires and that it has an unlimited flow of milk, and love which the breast keeps for its own gratification. This feeling adds to his sense of grievance and hate, and the result is a disturbed relation to the mother.

185—I have often referred to the infant’s desire for the inexhaustible, ever-present breast. But it is not only food he desires; he also wants to be freed from destructive impulses and persecutory anxiety. This feeling that the mother is omnipotent and that it is up to her to prevent all pain and evils from internal and external sources is also found in the analysis of adults.

193—Infants whose capacity for love is strong feel less need for idealization than those in whom destructive impulses and persecutory anxiety are paramount. Excessive idealization denotes that persecution is the main driving force. Idealization is a corollary of persecutory anxiety—a defense against it—and the ideal breast is the counter-part of the devouring breast.

218—By internalizing the breast so greedily that in the infant’s mind it becomes entirely his possession and controlled by him, he feels that all the good that he attributes to it will be his own. This is used to counteract envy.

254—With greed goes the urge to empty the mother’s breast and to exploit all the sources of satisfaction without consideration for anybody.