Philip Larkin (9 August 1922 – 2 December 1985 / West Midlands / England)

ThE LAST stanza: where any-angled light can congregate endlessly; Elkins uses to describe Monet's impressionism (What Painting Is)

Indeed, water and religion go way back and one way to look at this poem would be as a commentary on that, and it makes you think. You could also simply look at this poem as a tribute to the sometimes refreshing and purifying experience that the old H2O can bring. But no matter what you get out of it, it certainly takes nothing from of it.