In Walter Isaacson's biography "Benjamin Franklin: An American Life," the author explores the complexities of belief and spirituality through Franklin's experiences. The quote from Diderot suggests that those who hold deistic views may lack the depth of experience that leads to atheism, implying a journey of understanding that comes with maturity and exposure to life's questions.

This perspective resonates with Franklin's own nuanced views on religion and reason. He sought a balance between faith and rational inquiry, often questioning traditional beliefs. Through Franklin's life, Isaacson illustrates how one's beliefs can evolve over time as individuals grapple with philosophical challenges.