Jesus taught that the Kingdom is within you (Luke 17:20-21) -- and to exclusively seek the One Teacher at the Core of your Mind and Being (see  At-Onement With The Logos/Son Of God http://BrotherOfJesus.org#AtOnement  ).  The literal text of the Gospels conveys to the sincere seeker how they must live in harmony with the Law of God -- but it is the spiritual meaning of the Gospels that connects the person you are in this world with your Inner Source.  And when rightly understood, the Gospels are an allegorical blueprint of your own mind that when used as the Key of Knowledge (see Application Of The Key Of Knowledge http://KeyOfKnowledge.org#ApplicationOfTheKeyOfKnowledge ), employs catalysts that connect the person you are in this world with the One Teacher and Source of Mind and Being.  And when properly used as the Key of Knowledge, the Gospels are designed to bring about the process of mental-expansion and spiritual-deepening.  

Jesus portrayed the leaders of the Jews as the "devil's spawn", because they threw away the Key of Knowledge in their historical carnal interpretation of the scriptures (see Christianity - The Devil's Spawn http://DevilSpawn.Ebionite.com ).   As the prodigal sons and daughters who are aimlessly wandering in this, the Far Country, the purpose of the Gospels is to open the inner "narrow gate" which enables each of us to return to the Edenic Kingdom.  And when Jesus made reference to the Truth that can set you free, it was this Truth of all Truths that nourishes the seeker with the Divine Manna of the Kingdom, that he was making reference to (see The Divine Manna - The foundation of the New Covenant http://BrotherOfJesus.org#NewCovenant ).  

Paul correctly portrayed the literal textural interpretation of the Gospels as the "milk" designed for "babes in Christ" -- i.e., "And I, brethren, could not speak to you as to spiritual people but as to carnal, as to babes in Christ.  I fed you with milk and not with solid food; for until now you were not able to receive it, and even now you are still not able; for you are still carnal" (1 Cor 3:1-3).   Stating that the spiritual meaning of the Gospels would be rejected as "foolishness" by the unenlightened minds of the faith-based believers -- i.e., “But the natural man does not receive the things of the Spirit of God, for they are foolishness to him; nor can he know them, because they are spiritually discerned” (1 Cor 2:14).  Why?  Because unless the mind is developed through the transformational process of mental-expansion by the allegorical catalysts which connects the person to the Source within them, they will remain incapable of comprehending the higher reality of the Soul and the Kingdom within. 

There is no modern writing that presents the blueprint of the mind to the student-seeker.  This self-knowledge does not exist in academia.   It does not exist in any books or non-scriptural writings.  And can only be set forth in allegorical presentations that has no linear parallel.  That this essential self-knowledge does not exist in the outer world, is why the Apostle Peter warned and is quoted in the Clementine Homilies: "...therefore great care is to be taken, that when the law of God is read, it be not read according to the understanding of our own mind. For there are many sayings in the divine Scriptures which can be drawn to that sense which every one has preconceived for himself; and this ought not to be done. For you ought not to seek a foreign and extraneous sense, which you have brought from without"  Why?  Because to "...the understanding of our own mind", the spiritual meaning of the Gospels will be seen as "foolishness".    Further, the fact that the "natural" organic mind of man is incapable of comprehending the higher reality of the Soul and the Kingdom, is the reason why the Apostle Peter warns the seeker "...not to seek a foreign and extraneous sense, which you have brought from without".  Because if you seek an interpretation from without, then the catalysts that are embedded in the scriptures cannot bring about the necessary process of mental-expansion and spiritual-deepening that is necessary to connect the person you are in this world with the Inner Source of Divine Manna which can only be imparted to those who use the Gospels as the Key of Knowledge and seek the Kingdom within.