An interesting passage from the Holy Father's Wednesday Catechesis, the second week in a row studying Tradition:
This [understanding of Tradition] is well evidenced in a few passages of the Pauline epistles: "I delivered unto you that which I also received" (1 Cor 15,3). And this is important. Saint Paul, as it is known, originally called by Christ with a personal vocation, is a true Apostle and nonetheless, even for him, what is fundamentally important is the faithfulness to that which he has received. He did not wish to "invent" a new Christianity, a "Pauline" one, so to speak. He insists, however: "I delivered unto you that which I also received." He delivered the initial gift which comes from the Lord and is the saving truth. Afterwards, near the end of his life, he writes to Timothy: "Keep the good deposit committed to thy trust by the Holy Ghost, who dwelleth in us. " (2 Tm 1,14)