"...The only problem I have is."
After listening to the story that Aiwass told, Sherlock's first reaction was to frown tightly, "How could you give such an unverified ritual to Miss Meg for use? If something happened to her..."
"If she had not succeeded in changing her path, then it wouldn't be much different from something happening to her."
Aiwass interrupted, "Her remaining life span was at most three months. What else could you do? You had to treat a dead horse as if it were a live horse doctor."
Sherlock fell silent.
He, of course, knew Aiwass was right—he just had to reason a little, and he knew the price of Meg's failed career change.
If she had not been successful in extending her life, then it was just a matter of bringing forward Meg's death by a few months. It wouldn't affect much.
Rather, it was precisely because he felt incapable of bearing the cost of Meg's death and yet could think of no solution... He was pained by such impotence.