The Pasteurs lived in a spacious apartment in the Institute: big rooms with heavy furniture, heavy curtains, dark soft rugs of the period. It was not until I was actually in the library where Madame Pasteur led me that I realized how sadly Pasteur was crippled by the paralysis of his left side which he had suffered twenty-five years earlier after three years of incessant and exhausting labor on the diseases of the silkworm. He moved with difficulty, he hesitated painfully over words; but his eyes were bright, curious, interested.

After a few more or less stumbling explanations on my part we fell to talking naturally. They made it so easy. Mr. McClure was insistent at that moment on what were called human documents, series of portraits of eminent people from babyhood to 1893. I must have a Pasteur series. Monsieur and Madame were delighted with the idea. The old albums were brought out, and the three of us bent over them exactly as we did now and then at home when the question of W. W. T. at one, S. A. T. at two, I. M. T. at three came up. Again and again they stopped to say: “Tiens! Voilà Pierre, comment il est drôle!” “Marie, comme elle est jolie!”

When the album was closed and we had talked long of his early life I made an effort to get some idea of what he was thinking of now, but he said: “No science. If you want that, go see Monsieur Roux.” And so reluctantly I went down the stairs that led from the apartment, the kindly old faces watching me, for Monsieur and Madame Pasteur had done me the honor to see me off, and Monsieur kept repeating as I went down, “Look out, the stairs are dark.”

When finally the article came out, in the second issue of McClure’s Magazine, September, 1893, I took a copy to him. He was as pleased as a boy with the pictures. On a later visit he complained that one of his colleagues had carried off the copy. Could I get him another? When I took this to him it was with the request that he write a maxim for the January, 1894, issue of the magazine.

Mr. McClure had had the happy idea of asking from leaders of science, industry, religion, literature a paragraph or two embodying their convictions as to the outlook for the world’s future, their hopes for it. There was need enough of encouragement. The world had been going through as bad a year as often comes its way, a year of despair, uncertainty, hopelessness. What was ahead? The replies which filled eighteen pages of the magazine included letters and sentiments from Huxley, Tyndall, Max Müller, Henry Stanley, Julia Ward Howe, Cardinal Gibbons, and a score of others: noble collection. It was published under the heading “The Edge of the Future.” It raised my interest in the venture to a high pitch of enthusiasm. It was for me the spirit, the credo of the new magazine. It meant something more than I had dreamed possible in magazine journalism.

For the “Edge of the Future” undertaking I was asked at a last moment to collect all the sentiments I could from distinguished Frenchmen. Pasteur, certainly, and he was easy. “Of course I will do it,” he said. “Come back, and I’ll have it ready.” But when I went back I found him in a flurry. He had written his pensée, and it was lost.

“Never mind,” comforted Madame Pasteur. “She’ll come back when you have it ready for her.”

And so I did; but it was unfinished, and Madame Pasteur had to stand over him, encouraging him with tender très biens and little pats while he wrote. He was peevish as a child; he didn’t like the looks of it, tried again, and finally with a pathetic look said: “I’m afraid you don’t want either. But if you do, take your choice.” And so I did.

What he had written was:

In the matter of doing good, obligation ceases only when power fails.