Reconciling self image work and ego

[riplo]

A lot of personal development books talk about changing your self image as being the key to actually changing your behaviour and level of effectiveness in life. For example if you have problems with lets say work ethic, one way to tackle that is to make change your perception of yourself from someone who can't / isn't meant to achieve much, to someone who is willing to put in the work to live a great life, thus installing a different self image.

But then from spirituality we know it's your self image that ends up causing you a lot of suffering. For example being a workaholic is in part because you have that rigid identity as someone who provides for their family etc.

So should we try and install different beliefs about ourselves, or is that a trap?