This is a useful distinction; reminds me of the lessons learned in Dr. William Glasser’s famous book “Positive Addiction”. We might think of motivation as inspired thinking. Follow-through is most effective as a mindless compulsion. The neurological differences in these behaviors are fascinating.
“Motivation is in the mind; follow-through is in the practice. Motivation is conceptual; follow-through is practical. In fact, the solution to a motivation problem is the exact opposite of the solution to a follow through problem. The mind is essential to motivation. But with follow through, it’s the mind that gets in the way”.
quoted from Your Problem Isn’t Motivation – Peter Bregman – Harvard Business Review