The Unlikely Pilgrimage of Harold Fry, by Rachel Joyce

He had learned that it was the smallness of people that filled him with wonder and tenderness, and the loneliness of that too. The world was made up of people putting one foot in front of the other; and a life might appear ordinary simply because the person living it had been doing so for a long time. Harold could no longer pass a stranger without acknowledging the truth that everyone was the same, and also unique; and that this was the dilemma of being human.

30 Days of Joy