One of the most striking points in John R. Gillis’s essay The Blue Humanities is how recently we began to imagine the ocean as something more than a void. For much of human history, the sea was feared, crossed, and used, but rarely admired. It was simply a highway to somewhere else, a space you had to endure on the way to land. Art, both painting and literature, transformed the sea from a background setting into a powerful presence in human imagination.

Before the 19th century, seascapes were almost invisible in the Western artistic tradition. Artists might sketch ships or bustling harbors, but the water itself was rarely the subject. The ocean was considered too flat, too empty, or too dangerous to deserve attention. That changed when painters like J. M. W. Turner and Winslow Homer turned their canvases toward the waves. Turner’s furious storms pull viewers into chaos, and Homer’s quiet horizons make us feel the vulnerability of human beings against vast waters. Suddenly, the sea wasn’t just scenery. It was the story.

Literature took the same turn. When Melville wrote Moby-Dick, he didn’t just write about whaling; he gave the sea moods, tempests, and silences that felt as alive as the characters themselves. The ocean was a force that shaped every decision and every outcome. Later writers like Rachel Carson combined science and lyricism in The Sea Around Us, reminding us that the waves that seemed distant actually sustain life on Earth. Through these works, the ocean became less of a barrier and more of a mirror, reflecting both human ambition and human fragility.

What I find most powerful about Gillis’s argument is that art didn’t just change how we look at the sea, but it changed what the sea means. Once painters and writers showed us that the ocean had depth, power, and beauty, it became part of culture. It became visible. And visibility matters. We cannot imagine climate change, rising tides, or marine ecosystems today without drawing on the images and stories that first made the ocean real to us.

This is the essence of the “blue humanities”: they remind us that the ocean is not blank space at the edges of our maps, but a central part of human life and imagination. To see the sea differently is to see ourselves differently, small, vulnerable, and yet connected to something vast and enduring. Art painted and wrote the sea into being, and now we can’t stop seeing it.