In "East of Eden," John Steinbeck explores the theme of personal growth and the importance of facing reality. The quote suggests that it may be more beneficial for an individual to leave behind the regrets and lost opportunities of the past. By doing so, one can embrace the present and venture into new experiences. This idea highlights the significance of letting go and moving forward in life.

Steinbeck's work often emphasizes the struggle between good and evil, as well as the inherent choices faced by individuals. The notion of stepping out from under "might-have-beens" symbolizes breaking free from the burdens of what could have been and instead embracing the unpredictable journey ahead. It serves as a reminder that staying trapped in the past can hinder personal development and fulfillment.