Swami Vivekananda 's teachings on the focus on the central idea that the human mind is an active force capable of shaping reality and achieving spiritual liberation. He emphasizes that concentration is the key to all knowledge and success, famously stating that the difference between an ordinary person and a "great" person is simply the degree of concentration they can bring to a single point. Key Themes and Teachings Swami Vivekananda's Quotes On Thought - VivekaVani