In "How to Care for the Insane," William D. Granger emphasizes the importance of proper training for caregivers, asserting that the highest standard of care can only be achieved through regular instruction. Written in 1886, this manual advocates for the benefits of teaching caregivers simple methods, fostering patience, and ensuring that every individual involved in the care of the mentally ill is well-equipped to perform their duties. While the medical guidance may be outdated, the core themes of compassion, education, and the responsibility of caregivers remain relevant today.