Emotions
It might take time for you to understand what the non-expression
of automatic emotions entails, and that is fine. What is entailed
in not indulging in your automatic emotions is being conscious
all the time. We are not talking about suppressing the emotions;
we’re talking about not expressing them. To express them
discharges them, and that stops you from really understanding
and going deeper. Expressing emotions stops the process of
transformation, because a truly mature human being does not
act on these emotions. This practice is most important; and
doing it will teach us a lot. (Diamond Heart Book 4, pg 53)

There is a beauty to the human being who experiences his or her
suffering without indulging, and getting lost in it. Truth sometimes
leads to the elimination of suffering, but it can also lead to
pain. Whichever results, if the student allows the perspective
of love and appreciation for reality, for truth – aware
that it brings joy or pain – a feeling of deep intimacy
within will result. You could be intimate with yourself, which
is satisfying and fulfilling regardless of whether the outcome
of the problem results in pain or pleasure. (Diamond Heart Book
4, pg 58)

Essence and emotions
Essence is something more real and more substantial than emotions.
Essence is something as a real as your blood. It is not a reaction.
But emotions are necessary for us. We need to become aware of
our emotions in order to understand and see our Essence; emotions
are a guide and point to where Essence has been lost. Understanding
emotions can help untangle the knots of the defenses which are
attempts to avoid experiencing the holes, and which maintain our
separation from Essence. (Diamond Heart Book 1, pg 25)

Most people wonder, if you don’t feel emotions what will
you feel? The more you feel Essence, the less you feel emotions.
You will still have sensations, and they will be deeper and stronger;
but when you feel Essence, your emotions will not be deeper and
stronger. An emotion is only a response of the nervous system.
Essence is not a response of the nervous system. There is something
there filling you. Part of you is present. Some people call the
essential aspects "the real feelings." But what people
usually call feelings or emotions are not Essence. Love, peace,
value, strength and will are aspects of Essence. That is the kind
of thing you experience. These are Essence. Instead of experiencing
anger you experience strength, calm strength; instead of feeling
superior or inferior, you experience value; you experience yourself
as a rounded Presence that is full and powerful. (Diamond Heart
Book 1, pg 25)