Star-like mingles with the stars

The painting above is American artist Frederick Judd Waugh's "Knight of the Holy Grail" (1912)

Sometime on lonely mountain-meres
I find a magic bark;
I leap on board: no helmsman steers:
I float till all is dark.
A gentle sound, an awful light!
Three angels bear the holy Grail:
With folded feet, in stoles of white,
On sleeping wings they sail.
Ah, blessed vision! blood of God!
My spirit beats her mortal bars,
As down dark tides the glory slides,
And star-like mingles with the stars.

This is a verse in Tennyson's "Sir Galahad"

Star-like mingles with the stars by Michael Emmanuel