From another great piece of writing by Joan Westenberg, “Why Belief Beats Discipline”:

We are not consistent with our goals. We are consistent with our identities. And if your identity says you’re inconsistent, undisciplined, doomed to flake or drift or binge or relapse, then the moment you raise your standards, your subconscious files an objection. You “forget” your commitments. You postpone things “just for today.” You start researching better productivity tools instead of doing the actual work. All of it in the service of returning to your known baseline - the set of standards you believe you can meet.