The Truth about the Truth
Is that the teachings of Jesus are the Truth, and not only His flesh. He said His Spirit gives life, and His Words are His Spirit. John 6
So then, what does it mean in practice?
Read the 4 gospels, as the teachings of Jesus within are the real Foundation of true Christianity and only by obeying those teachings you will really ever be saved and freed from the system. Matthew 6 and 7.