In the following excerpt from a psychological thriller, we meet the character of Tom, a seemingly ordinary man who harbors a secret. The narrative states, 'While his neighbors saw him as an unremarkable man, Tom spent his evenings meticulously planning every detail of his next move, scribbling ideas in a worn-out notebook that he hid under the loose floorboard in his study. His smile was always gentle, hiding the tempest of chaotic thoughts racing through his mind.'

Based on this characterization, what does Tom's behavior reveal about his inner life and motivations?