To put it another way: All of us who live to work for our fellow-men or who hope to lift them higher by our word begin with our own visions of a great future. These visions, though our youth lends to them an original generosity and enthusiasm, are, like Isaiah's, largely borrowed. The progressive instincts of the age into which we are born and the mellow skies of prosperity combine with our own ardour to make our ideal one of splendour. Persuaded of its facility, we turn to real life to apply it. A few years pass. We not only find mankind too stubborn to be forced into our moulds, but we gradually become aware of Another Moulder at work upon our subject, and we stand aside in awe to watch His operations. Human desires and national ideals are not always fulfilled; philosophic theories are discredited by the evolution of fact. Uzziah does not reign for ever; the sceptre falls to Ahaz: progress is checked, and the summer of prosperity draws to an end. Under duller skies ungilded judgement comes to view, cruel and inexorable, crushing even the peaks on which we built our future, yet purifying men and giving earnest of a better future, too. And so life, that mocked the control of our puny fingers, bends groaning to the weight of an Almighty Hand. God also, we perceive as we face facts honestly, has His ideal for men; and though He works so slowly towards His end that our restless eyes are too impatient to follow His order, He yet reveals all that shall be to the humbled heart and the soul emptied of its own visions. Awed and chastened, we look back from His Presence to our old ideals. We are still able to recognize their grandeur and generous hope for men. But we see now how utterly unconnected they are with the present--castles in the air, with no ladders to them from the earth. And even if they were accessible, still to our eyes, purged by gazing on God's own ways, they would no more appear desirable. Look back on Isaiah's early ideal from the light of his second vision of the future. For all its grandeur, that picture of Jerusalem is not wholly attractive. Is there not much national arrogance in it? Is it not just the imperfectly idealized reflection of an age of material prosperity such as that of Uzziah's was? Pride is in it, a false optimism, the highest good to be reached without moral conflict. But here is the language of pity, rescue with difficulty, rest only after sore struggle and stripping, salvation by the bare arm of God. So do our imaginations for our own future or for that of the race always contrast with what He Himself has in store for us, promised freely out of His great grace to our unworthy hearts, yet granted in the end only to those who pass towards it through discipline, tribulation and fire.
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This, then, was Isaiah's apprenticeship, and its net result was to leave him with the remnant for his ideal: the remnant and Jerusalem secured as its rallying-point.