In "Southern Mail," Antoine de Saint-Exupéry explores the notion of suffering in relation to acceptance and surrender. The protagonist realizes that by allowing life to unfold naturally, without resistance, he can alleviate his pain. The concept suggests that suffering often stems from the struggle against circumstances, and by surrendering to the present, one can find peace.

The text highlights that even when faced with sadness, yielding to one's emotions can lead to a form of liberation from suffering. Embracing sadness instead of fighting it allows for a deeper experience of life, emphasizing that acceptance can transform one’s perspective on adversity.