The quote from Robert Ludlum's "The Bourne Identity" highlights the tendency of individuals to believe strongly in their own perspectives. Convincing oneself of being right can be a simple endeavor, suggesting that personal biases often overshadow objective reasoning. This idea emphasizes the human inclination to affirm one's beliefs, particularly as one ages and accumulates experiences that can reinforce these viewpoints.

As people grow older, they may become even more set in their ways, losing the capacity for self-doubt and critical reflection. This can create a sense of inertia in thought processes, making it difficult for individuals to re-evaluate their beliefs. The quote serves as a reminder of the importance of staying open-minded and questioning our own convictions, regardless of age or experience.