"Nature can destroy."

"So can man; and, of the two, he is the more powerful in destruction. His work also is of a higher quality, because of the intelligence which directs it. He can go on or turn back. Nature creates forces which, apart from their creator, produce certain results--some beautiful and harmonious, some frightful and destructive. For these results nature is only indirectly responsible; the forces she creates work independently to their own end. When a great storm is about to burst, it is not in nature's power to will that it shall dissolve into gentleness. Hence, nature, all powerful up to a given point, is powerless beyond it."

"And man?"

"Is all powerful. He wills and executes. He aspires to win, and he works to win. He desires, and he schemes to gratify his desire." I paused, and as Doctor Louis did not immediately reply, continued: "If there is not perfect accord between us in large contentious matters upon which the wisest scientists differ, that is no reason why there should not be between us a perfect friendship."

"I am pleased to hear you say so; it means that you desire to retain my friendship."

"I earnestly desire it."

"And would make a sacrifice to retain it?"

"Sacrifice of what?"

"Of some wish that is dear to you," replied Doctor Louis.

"That depends," I said. "In entering upon a serious obligation it behoves a man to be specific. Doctor, we are drifting from the subject which occupies your mind. Concentration would be of advantage to you in any information you wish to obtain from me."