43. I have often had occasion to allude to the apparent connection of brilliancy of colour with vigour of life or purity of substance. This is pre-eminently the case in the mineral kingdom. The perfection with which the particles of any substance unite in crystallization, corresponds in that kingdom to the vital power in organic nature; and it is a universal law, that according to the purity of any substance, and according to the energy of its crystallization, is its beauty or brightness. Pure earths are white when in powder; and the same earths, which are the constituents of clay and sand, form, when crystallized, the emerald, ruby, sapphire, amethyst, and opal. 44. As we pass between the hills which have been shaken by earthquake and torn by convulsion, we find that periods of perfect repose succeed those of destruction. The pools of calm water lie clear beneath their fallen rocks, the water-lilies gleam, and the reeds whisper among their shadows; the village rises again over the forgotten graves, and its church tower, white through the storm-light, proclaims a renewed appeal to His protection in whose hand "are all the corners of the earth, and the strength of the hills is His also." There is no loveliness of Alpine valley that does not teach the same lesson. It is just where "the mountain falling cometh to nought, and the rock is removed out of his place," that in process of years the fairest meadows bloom between the fragments, the clearest rivulets murmur from between their crevices among the flowers, and the clustered cottages, each sheltered beneath some strength of mossy stone, now to be removed no more, and with their pastured flocks around them, safe from the eagle's stoop and the wolf's ravin, have written upon their fronts, in simple words, the mountaineer's faith in the ancient promise,--"Neither shalt thou be afraid of destruction, when it cometh; for thou shalt be in league with the stones of the field, and the beasts of the field shall be at peace with thee." SECTION VII. ILLUSTRATIVE: PLANTS AND FLOWERS.