Margaret R. Ellsberg said this quote

“ The Incarnation of Christ raised the energy of everything. And when Hopkins placed his conviction of this into poetry, he tended to mention electricity, lightening, fire, flash, flame. He wrote in his late, great poem, That Nature is a Heraclitean Fire and the comfort of the Resurrection: 'In a flash, at a trumpet crash, / I am all at once what Christ is, / since he was what I am and / This jack, joke, poor potsherd, / patch matchwood, immortal diamond, / Is immortal diamond. ”