What this quote means

Chesterton compares the difficulty of knowing oneself to that of understanding the cosmos, suggesting that the self is an unfathomable mystery. This quote resonates with the idea that introspection is an endless journey, where each discovery hides another. It applies to our quest for identity: accepting that self-knowledge is a continuous, never-completed process, and that we are often strangers to ourselves.

How to apply it daily

Adopt an exploratory attitude toward yourself: keep a journal of your thoughts and behaviors, and look for patterns that surprise you.