The Cantos: V

Topaz I manage, and three sorts of blue;
but on the barb of time.
The fire? always, and the vision always,
Ear dull, perhaps, with the vision, flitting
And fading at will. Weaving with points of gold,
Gold-yellow, saffron... The roman shoe, Aurunculeia'a

barb of time: Perhaps an allusion to Giordano Bruno's motto vincit instans ("the instant triumphs"), of which Bruno says that the creative instant or inspiration is a barb of light which pierces the mind to give one a totally new perception beyond all mere logic chopping. This links up with Pound's notions regarding the "luminous detail" -- Companion