The quote from Jonathan Safran Foer's book, "Extremely Loud and Incredibly Close," highlights the challenge of changing someone's mind when they are firmly set in their beliefs. It suggests that no amount of evidence or reasoning can sway a person who is unwilling to be persuaded. This reflects the complexity of human perspectives and the barriers to communication that can arise from deeply held convictions.

On the other hand, the quote illustrates that for those who are open to belief, there are many signs and hints that can reinforce their faith. This duality points to the idea that belief is subjective; while some individuals remain skeptical, others find comfort and strength in the clues that resonate with their personal truths. This emphasizes the importance of individual willingness to engage with different viewpoints and the transformative power of belief when combined with an openness to understanding.