the stage is set for the frustrations that we gather together under the word ‘weaning’; but it should be remembered that when we talk about the phenomena that cluster round weaning we are assuming the underlying process, the process by which opportunity for illusion and gradual disillusionment is provided.
Winnicott argues that weaning is only intelligible as a developmental achievement against the background of the prior illusion-disillusionment dialectic, without which the infant cannot even reach a normal weaning reaction.
, Playing and Reality, 1971thesis