In transforming the grim, abusive, violent, and yet often serene reality of the subway into a language of colour, I see the subway as a metaphor for the world in which we live today, writes Davidson. ‘From all over the earth, people come into the subway. It’s a great social equaliser. As our being is exposed, we confront our mortality, contemplate our destiny, and experience both the beauty and the beast. From the moving train above ground, we see glimpses of the city, and as the trains move into the tunnels, sterile fluorescent light reaches into the stony gloom, and we, trapped inside, all hang on together.