How would you explain biblo's father's proverb Ever worm has his weak spot?

Bilbo's father's proverb "Every worm has his weak spot" suggests that everyone, no matter how tough or seemingly invulnerable, has vulnerabilities or weaknesses. It emphasizes the idea that understanding these weaknesses can be crucial for overcoming challenges or adversaries. This wisdom reflects the importance of recognizing both one's own limitations and those of others, underscoring that no one is invincible.