Touched by their attention, the holy man taught them the Gospel.
"Inhabitants of this island, the earthly day that has just risen over your rocks is the image of the heavenly day that rises in your souls. For I bring you the inner light; I bring you the light and heat of the soul. Just as the sun melts the ice of your mountains so Jesus Christ will melt the ice of your hearts."
Thus the old man spoke. As everywhere throughout nature voice calls to voice, as all which breathes in the light of day loves alternate strains, these penguins answered the old man by the sounds of their throats. And their voices were soft, for it was the season of their loves.

Book I : The Beginnings, Ch. V : The Baptism Of The Penguins - Penguin Island (1908)