[rrajasek]

The "Textbook definition" point you made is quite confusing.

"Being who you are" means that you keep your values static and shape your decisions around those, unless there is some additional nuance to this.

The GP is making a point that you need to make a clear assessment of yourself - in particular your actions, your deficiencies and strengths and identify values to adopt which could make a positive impact to your life. That's not the the same thing according to me, unless I misinterpreted what you intended.

[erikerikson]

If changeable, are those values really part of who you are? Can being who you are can be an endless journey of discovery until you die?

[shuntress]

Can you be yourself or stay true to who you are without having a clear assessment of yourself?