It depicts the classical subject related by
Virgil in his
Aeneid (book 6, line 369) and
Dante in the
Inferno (canto 3, line 78) at the centre of the picture within the
Christian traditions of the
Last Judgment and the
Ars moriendi. The larger figure in the boat is
Charon, who transports the souls of the dead to the gates of
Hades. The passenger in the boat, too minute to distinguish his expressions, is a human soul deciding between
Heaven, to his right (the viewer's left), or
Hell, to his left. The river
Styx divides the painting down the centre. It is one of the four rivers of the underworld that passes through the deepest part of hell. On the painting's left side is the fountain of
Paradise, the spring from which the river
Lethe flows through Heaven. On the right side of the composition is Patinir's vision of Hell, drawing largely on
Boschian influences. He adapts a description of
Hades, in which, according to the
Greek writer Pausanias, one of the gates was located at the southern end of the
Peloponnesus, in an inlet still visible on the
Cape Matapan. In front of the gates is
Cerberus, a three-headed dog, who guards the entrance of the gate and frightens all the potential souls who enter into Hades. The soul in the boat ultimately chooses his destiny by looking toward Hell and ignoring the angel on the river-bank in Paradise that beckons him to the more difficult path to Heaven. ==Composition and colour==