The Child of the Dawn by A.C. Benson

I returned, as I said, with a sense of serene pleasure and security to my work; but that serenity did not last long. What I had seen with Amroth, on that day of wandering, filled me with a strange restlessness, and a yearning for I knew not what. I plunged into my studies with determination rather than ardour, and I set myself to study what is the most difficult problem of all -- the exact limits of individual responsibility. I had many conversations on the point with one of my teachers, a young man of very wide experience, who combined in an unusual way a close scientific knowledge of the subject with a peculiar emotional sympathy.

He told me once that it was the best outfit for the scientific study of these problems, when the heart anticipated the slower judgment of the mind, and set the mind a goal, so to speak, to work up to; though he warned me that the danger was that the mind was often reluctant to abandon the more indulgent claims of the heart; and he advised me to mistrust alike scientific conclusions and emotional inferences.