From The Alienist by Caleb Carr:

"If it seems odd that I offered no further protest, I can only say this: Kreizler's explanation that his present course of action had been inspired by a document I had sent him years ago, coming as it did on the heels of our shared reminiscences about Harvard and Theodore's mounting enthusiasm for this plan, had suddenly made it plain to me that what was happening in that office was only partly a result of Georgio Santorelli's death. Its full range of causes seemed to stretch much farther back, to our childhoods and subsequent lives, both individual and shared. Rarely have I felt so strongly the truth of Kreizler's belief that the answers one gives to life's crucial questions are never truly spontaneous; they are the embodiment of years of contextual experience, of the building of patterns in each of our lives that eventually grow to dominate our behavior. Was Theodore--whose credo of active response to all challenges had guided him through physical sickness in youth and political and personal trials in adulthood--truly free to refuse Kreizler's offer? And if he accepted it, was I then free to say no to these two friends, with whom I had lived through many escapades and who were now telling me that my extracurricular activities and knowledge--so often dismissed as useless by almost everyone I knew--would prove vital in catching a brutal killer? Professor James would have said that, yes, any human being is free, at any time, to pursue or decline anything; and perhaps, objectively, that is true. But as Kreizler loved to say (and Professor James ultimately had a hard time refuting), you cannot objectify the subjective, you cannot generalize the specific. What man, or a man, might have chosen was arguable; Theodore and I were the men who were there."