This document introduces the science of Raja Yoga, which provides a practical method for reaching spiritual truths through direct experience rather than belief alone. It argues that all religions are based on the direct experiences of enlightened individuals, though modern religions often ask people to believe without experiencing for themselves. Raja Yoga aims to teach a scientific method through which anyone can verify religious and metaphysical truths by observing the mind and developing higher perceptions. By faithfully practicing the prescribed methods, light and higher knowledge will come.