When the disciples saw him walking on the lake, they were terrified. "It's a ghost," they said, and cried out in fear. Matthew 14:26, NIV
"Look at my hands and my feet. It is I myself! Touch me and see; a ghost does not have flesh and bones, as you see I have." Luke 24:39, NIV
Jesus did not deny the existence of ghosts; He simply said He wasn't one. So I can imagine there's a lot of confusion. In the Gospel of Matthew, the disciples saw Moses and Elijah (who had not yet resurrected) with Jesus on the Mount of Transfiguration (Matt. 17:1–9).
My faith basically says - along with Scripture it forbids divination or necromancy—summoning the dead or other practices meant to seek forbidden knowledge (e.g., Deut. 18:11 cf. Lev. 19:31; 20:6, 27; CCC 2116). Which is a bit different than saying "there's a ghost"
I think that's exactly right.
