(Tobit 3:17) Raphael teaches Tobias that he can use the heart, liver, and gallbladder of a fish to heal both Sarah and Tobit. (Tobit 6:5) In this story, the angel, Raphael uses the good knowledge that he possesses to heal Tobit and to free Sarah of the demons. The knowledge that he shares is good because not only does it help both Tobit and Sarah, but he had God’s permission to share this knowledge. Raphael only shares this precious and valuable information with Tobias because he was commanded by God to do so. God wants the humans in this passage to be aware of this, deeming this knowledge both good and helpful.