Symbiosis
Thus during the time of symbiosis, much of the mother's personality
is imbibed, so to speak. This point becomes painfully clear in
the deeper stages of essential development, when the student begins
to deal with the merged representations. He will realize that
many of his traits, conflicts and emotional proclivities are not
his own. He will see that he is living not only his own life,
but also the life of his mother (and his father to some extent),
and her mother before her, and so on. One will realize, with horror
or perhaps with humor, that he has literally inherited the deeper
layers of his personality. One lives, to a greater extent than
one cares to face, the emotional lives people long forgotten.
(The Pearl Beyond Price, pg 248)

During the symbiotic phase the infant is in complete contact
with the mother’s consciousness. He feels her joy, her fear,
her anger, her pain, her frustration, her weakness and so on but
he is not aware that these are the mother’s feelings, for
he has no sense of a separate self. So what he feels and what
mother experiences make up the content of his merged relationship
with her. This phenomenon has many disturbing implications. One
is that the quality of the symbiosis is not dependent only on
the child’s interaction with his mother, but also on the
general inner state of the mother. Developmental psychology has
considered the effect of the mother’s state on the infant
only in so far as her state determines to a large extent her interactions,
reactions, responses and attitude towards her child. We are seeing
here that her influence is much greater than that. Her inner state,
regardless of what it is, is experienced by the infant as part
of the merged relationship, and internalized as part of the merged
representation. This means that the totality of her emotional
make up is internalized and identified with as the merged representation.
We have seen this phenomenon on many occasions while observing
a mother with her sleeping infant. The infant is asleep and peaceful.
The mother becomes anxious, for some reason. The infant feels
the anxiety, and wakes up fretting. The mother thinks something
is happening to the infant, so she comforts him, by nursing him,
for example. In this way she discharges her anxiety and calms
down. Now the infant calms down and goes back to sleep. Everyone
believes that the mother has regulated her infant, while the fact
is that in this instance the infant helped her regulate herself.
(The Pearl Beyond the Price, pg 246)

Child and symbiosis
However, our observation is that during symbiosis the Merging
Essence is actually present in the infant's consciousness most
of the time, not only after discharge of tension. This is particularly
so when the relationship with the mother is basically positive
and gratifying. The Merging Essence seems to be needed by the
organism at that time for healthy maturation and growth. Its presence
brings about the symbiotic connection to the mother needed for
survival and psychological development. (The Pearl Beyond Price,
pg 236)