All religious and spiritual movements emphasized the importance of self-knowledge for developing a personal relationship with divinity. Rather than rely on convoluted theories or convictions without evidence, aspirants of any tradition can develop experiential wisdom of mystical truths through the application of practical techniques. See how through an examination of the Gnostic Gospel of Thomas, Socrates\u2019 daemon in the Apology, Samael Aun Weor\u2019s explanation of spiritual inquietudes, and the famous Greek maxim of Delphi: \u201cGnothi Sauton\u201d or \u201cKnow Thyself.\u201d