Success is the sum of small efforts, repeated day in and day out.

The statement defines success not as a single decisive act or a stroke of luck, but as an accumulation: modest actions performed consistently. Its force lies in shifting attention from outcomes to process—what matters is the repeatable routine that compounds into mastery, reputation, savings, fitness, or creative output. It also implies an ethical and psychological lesson: perseverance is more reliable than inspiration, and progress is often invisible day to day even as it becomes decisive over months and years. In Collier’s success-writing framework, the quote functions as a rebuttal to “overnight success” myths and a defense of habit as destiny.