Elyne Mitchell said this quote

I? I am the wind,’ said Thowra. ‘I come, I pass, and I am gone.’ The strange feathers moved up and down, the strange voice said tartly: ‘And are your sons the same?’ ‘My son is the lightning that strikes through the black night. My grandson is light that pierces the dark sky at dawning.’ ‘Ah,’ said the first emu, ‘and we know your daughter is the snow that falls softly from above and clothes the world in white. You want but the rainbow — that is and was and never will be, and is yet the promise of life — and the glittering ice which is there and is gone: then you and your family will possess all magic.