"Diamond Cutter" is a book written by Geshe Michael Roach, a Tibetan Buddhist monk and entrepreneur. It combines ancient Buddhist wisdom with modern business practices, focusing on how to achieve success and happiness in life. The book emphasizes the importance of understanding the interconnectedness of all things and how our actions can shape our experiences. The central concept of "Diamond Cutter" is the idea of "seeds," which represent our thoughts and actions. By planting positive seeds through good deeds and intentions, we can cultivate a fruitful life. The book offers practical advice on applying these principles in both personal and professional settings.