By neglecting the appropriation of truth they cast aspersions on both God and his Word. The Philippians saw a concrete example in Paul of his teaching. They heard Paul teach the Word of God personally. This term does not refer to a formal learning process. In this case they learn from Paul's person rather than his role as a teacher.
Relationship is crucial for the learning process in Christianity.
The Philippians saw Paul translate what he taught into action with their own eyes. His life matched his lips. The eyes of their soul saw the life of Paul. The soul has perception. Paul's life was an open book.