In clear and persuasive language, the author has sketched the four great paths to God-realization, namely, Karma yoga, Bhakti yoga, Raja yoga and Jnana yoga.
Understanding human nature is the highest knowledge, and only by knowing it can we know God. It is also a fact that the knowledge of God is the highest knowledge, and only by knowing God can we understand human nature.
-Swami Vivekananda