Knowledge of facts is important. Knowledge of truth is essential. Yet our Lord's concern goes beyond mere head knowledge. He wants us not only to know the truth but also to obey the truth. He wants us to live the truth, practice the truth, and be conformed to and transformed by that truth.
Art is craft: all art is always and essentially a work of craft: but in the true work of art, before the craft and after it, is some essential durable core of being, which is what the craft works on, and shows, and sets free. The statue in the stone. How does the artist find that, see it, before it's visible? That is a real question.