"To carry the self forward" means to look for something outside of yourself. Doing that, immediately a dichotomy arises. No matter how much you practice, still a gap remains, and even enlightenment can become a hindrance by which you increase the separation between yourself and others. Enlightenment is one of the sicknesses of Zen!

Taizan Maezumi, On Zen Practice by Taizan Maezumi, editor, Bernie Glassman, editor