The Old Masters; how well, they understood
Its human position; how it takes place
While someone else is eating or opening a window or just walking dully along;
How, when the aged are reverently, passionately waiting...

To fully appreciate the rest of this poem, you need to see the painting it's about. You can see it here, along with the full poem.
https://poetrypages.lemon8.nl/life/m...ebeauxarts.htm