"Well, I certainly did not think that I could do worse"

In this quote, D. W. Griffith expresses surprise and disbelief at his own capabilities. He is confessing that he did not have high expectations for himself and did not believe he was capable of doing worse. This could suggest a lack of confidence or insecurity on Griffith's part. It might likewise indicate that he had low standards for his work and did not think he might fail to fulfill them. In general, this quote exposes Griffith's humility and maybe a sense of self-deprecation. It also highlights the concept that sometimes our own perceptions of our capabilities can limit us, and we might amaze ourselves by exceeding our own expectations.