I am now going to discuss the force which is behind the feeling of aggression. Klein is often claiming that the infant has an innate drive to destroy everything that is good. However, David Hiles suggests that “this is simply a misunderstanding of the mechanism of envy”. Thus, envy is the force which leads to such hatred of an external object, inevitably causing aggression. This envy is a result of the infant’s ego experiencing a denial of something they want or need. For example, the mother may be possessing yet withholding something which the infant desires, such as the infant wanting to be fed, or to be given attention. Envy is therefore “the feeling of conflict that what one desires, and would normally be forthcoming, but is being withheld”. The envious impulse within the infant encourages them to attack the very source which they originally relied upon for what was desired. Melanie Klein believed the breast to be the first object envied by the infant. Thus, withholding the breast, which the infant trusts to contain ‘goodness’, causes the infant to respond aggressively, often biting the mother physically, or attacking her through phantasy.However, if a nurturing and loving environment is provided by the mother, and if the Paranoid-Schizoid stage is tolerated and worked through, then normal development will often follow. Excessive envy can lead to a weakened ego, also triggering an intense feeling of guilt. The infant realises that they are destroying the primary good object which is providing them with goodness through their envious attacks. Thus, they are gradually enter the Depressive Position, and slowly begin to realise that the mother is a whole object, and that they love and hate the same object.