In the poem Beowulf what is the final thought the poet is relaying in Lines 389 – 396 ?

Lines
“Down the road. And sometimes a proud old soldier
Who had heard songs of the ancient heroes
And could sing them all through, story after story, Would weave a net of words for Beowulf ’s Victory, tying the knot of his verses
Smoothly, swiftly, into place with a poet’s
Quick skill, singing his new song aloud
While he shaped it, and the old songs as well. . . .”