Sometimes in the watches of the night, especially of a Sunday night, it occurred to him that (owing to the domestic arrangement which kept the boy in a place which, when all was said and done, was a place of temptation) Keith's soul, no less immortal, might be in jeopardy too. He thought of him, an innocent lad, thrown on the mercy of London, as it were. But Isaac had faith in the mercy of the Lord. Besides, he wasn't the sort, a quiet, studious young fellow like Keith wasn't. And when Isaac's conscience began to feel a little uncertain upon that point, he simply laid the case circumstantially before the Lord, who knew all his difficulties and all his sins, and was infinitely able and eternally willing to bear them for him. By casting Keith upon the Lord an immense burden of responsibility was slipped from his conscience; and by the time Monday morning came round Isaac was again convinced that he had made the very best arrangements. For not only was the state of Keith's soul a reproach to Isaac's conscience, but the brilliance of Keith's intellect was a terror to it. Any day that same swift illuminating power might be turned on to the dark places in his own soul, showing up the deplorable discrepancies between his inner and his outer life. He wanted his son and everybody else to think well of him, and Keith's lucid sincerity at times appalled him. He had not yet discovered that his protection was in the very thing he feared. Keith was so recklessly single-minded that it never occurred to him that his father could lead a double life; he never doubted for an instant that, as in his own case, the Saturday to Monday state revealed the real man. He, Keith, sat so lightly to the business and with so detached a mind, that he simply could not imagine how any human being could be so wedded to a thing in itself uninteresting as to sacrifice to it any immortal chances. The book trade was not a matter for high spiritual romance; it was simply the way they got their living, as honest a way as any other, taking it all round. The shop was one thing, and his father was another. In fact, so far from identifying them, he was inclined to pity his father as a fellow-victim of the tyranny and malignity of the shop.