This book serves as an introduction to the six systems of Hindu philosophy. Though these six systems are different in their approaches to the truth, they are unanimous as far as the final goal of humankind is concerned, which is, total eradication of suffering and attainment of state of eternal peace.
All truth is eternal. Truth is nobody's property; no race, no individual can lay any exclusive claim to it. Truth is the nature of all souls.
-Swami Vivekananda