The quote suggests that having absolute certainty about the outcomes of life's events from the very start can lead to either profound wisdom or ignorance. However, regardless of which it is, such certainty can detract from the joy and curiosity that comes with new beginnings. This mindset may rob a person of the beauty of exploration and the excitement of the unknown.
By declaring an end before truly experiencing the journey, one risks stagnation and dissatisfaction. The author emphasizes that embracing uncertainty and maintaining a sense of wonder are essential to human fulfillment, allowing one to discover the richness of life's experiences rather than succumbing to a predetermined fate.