Transformation
If you are interested in becoming a truly mature human being,
you must conduct yourself according to the highest values you
know, all the time. It is part of being a mature human being to
put in the effort of conducting yourself thusly. If you believe
that the integration of your realization should just happen by
itself or that it should be easy, you are not understanding what
life is all about and you are behaving like an infant. To become
a gracious, generous, respectful, loving, kind, and clear human
being, you have to work at it. It is not going to simply happen.
God is not going to do it for you. You have to put effort into
it, minute by minute; otherwise you will not transform. (Diamond
Heart Book 4, pg 49)

Until we directly experience spiritual transformation, we do
not truly understand that this transformation involves such radical
changes in our experience of ourselves and our world that it is
not a matter of becoming a transformed individual; we recognize,
rather, that the reality that is realized is something that cannot
be limited by such notions as "individual" and "world."
The very principles and categories of experience that we take
to be incontrovertible truths are transformed. What goes through
a radical transformation is specifically our view of what truly
exists, and the mode of this existence. In other words, spiritual
liberation is a matter of one's experience and perception moving
to another dimension of existence that has its own perspective,
and further, of this dimension becoming the centre and foundation
of experience. (Facets of Unity, pg ix)

Understanding and transformation
True understanding has to do with transformation. If there is
no transformation at the moment of understanding, then there is
no real understanding. Without transformation, understanding is
just a mental activity, part of the seeking activity. True understanding
that arises on its own is simply your own Essence touching your
mind, or Being in contact with the situation. The actual contact
of Being with any situation, or with any part of your mind, is
understanding. (The Diamond Heart Book 4, pg 28)

The transformation through which the inner journey takes the
soul is not a change of her character, but a self-realization
of true nature. This means one's field of consciousness ceases
to be configured by ego structures, and becomes completely permeable
to essential presence. One's identity ceases to be determined
by one's history and becomes simple abiding in true nature. One's
identity shifts dimensions, leaving that of historical content
and abiding in timeless presence. (Inner Journey Home, pg 193)

Transformation and self
Our sense of self is transformed when it attains its essential
nature, the ontological presence that is pure Being. No amount
of psychological growth work is sufficient to bring this about
because the psychological realm, as it is known in ordinary experience,
is a distorted and incomplete experience of our interiority, since
it is out of contact with Being. Psychological observation and
processing are necessary for the work of transformation, but if
this transformation is to become truly spiritual, we need access
to the dimension of Being. Human beings typically live in a state
of arrested development in which the psychological domain rules
our consciousness. Reaching the fullness of our potential entails
resuming our development, which leads beyond the psychological
to the realm of Being or spirit. (Facets of Unity, pg ix)