He lets us see nature, as it existed in his day, both wild in the forest and wilderness, and cultivated around the abodes of men; and he paints for us the figures of the country people themselves and the labours they went forth to. We see in his pages the trees of the wood moved by the wind; the willows by the water-courses; the fresh branches sprouting from the stock of the pollard oak or terebinth. We hear the doves mourning from the depths of the thicket, and see the roe, chased by the hunter, disappearing within its shelter, and even the schoolboy rifling the birds' nests so ruthlessly that "there was none that moved the wing or opened the mouth or peeped." We see the swarms of bees and flies resting on the branches in the summer heat; the ploughshare lying in the furrow; the tow and the distaff; the ox turning its head to be patted by the hand of its owner, and the ass trotting off at feeding-time to its master's crib. The prophet looks with a specially observant and sympathetic eye on the toils of men--the woodman thinning the trees of the forest; the carpenter, with saw and axe, turning to his own uses the sycamore and the cedar; the builder among his bricks and stones; and the farmer, on the exposed height of the threshing-floor, winnowing his corn with the shovel and the fan. As is usual in the Bible, the shepherd is portrayed with special honour, whether he calls out his neighbours to frighten away the lion from his flock or is seen gathering the lambs in his arms and carrying them in his bosom. But most of all does the poet-prophet love to linger in the vineyard, marking accurately all the operations of the vine-dresser and all the stages of the growth of the vines. We see the tearing up of the hillside with the mattock, the accumulation of soil, the gathering out of the stones, the construction of the winepress and the watch-tower. Then we see the roots planted and growing from stage to stage--from that "afore the harvest, when the bud is perfect and the sour grape is ripening in the flower," to that when the vineyard is ringing with the songs of the vintage and the gleaners are picking the last relics from the outermost branches. At whatever period these pictures of nature were laid up in the memory of Isaiah, they came back to him when he was engaged in the work of a prophet, and supplied the imagery by means of which the Divine truths which he heralded were made impressive and attractive to his countrymen and acceptable to all subsequent generations; for men are so made that they are never so won by the truth as when they see it reflected in a physical image. These two sides of the prophet's activity nearly correspond to what we should call Thought and Expression. Or, to put it still more broadly, the preacher must be a man who both has something to say and knows how to say it. On these two apparently simple qualifications hang all the science and art of our vocation.