Undertow

Four figures struggle against a wall of surf in Winslow Homer's "Undertow," painted in 1886. Two muscular rescuers drag two women from the sea, their bodies pressed close and heavy with water. One woman tilts her head back in exhaustion while the man behind her braces against the pull of the waves. The rescuer on the right, in his soaked hat and rolled trousers, leans into the effort with every muscle tensed. Behind them, a green wave rises and breaks into white foam, a reminder of the force these people are fighting.

The way Homer got this scene so right is a story in itself. He is said to have watched a real rescue happen at Atlantic City, then went home to New York and posed models on the roof of his studio, tossing buckets of water over them until the wet, clinging effect looked believable. Homer built his reputation on marine scenes like this one, capturing both the danger of the ocean and the grit of the people who faced it. As a realist painter, he cared less about beauty than about truth, and here you get both the raw power of the sea and the plain human effort of saving a life.