Contradiction with Matthew 5:14
This verse describes believers as the light of the world, meant to be seen and shared, which contrasts with the instruction in Luke 8:56 to keep a miracle private.
Matthew 5:14: Ye are the light of the world. A city that is set on an hill cannot be hid.
Contradiction with Mark 7:36
After performing a miracle, Jesus instructs those present to keep it secret, but they spread the news all the more, contradicting the instruction for silence in Luke 8:56.
Mark 7:36: And were beyond measure astonished, saying, He hath done all things well: he maketh both the deaf to hear, and the dumb to speak.