Theophylact of Ohrid — as excerpted in the Catena Aurea on Mark 4:1-20

“Or, the stony persons are those who adhering a little to the rock, that is, to Christ, up to a short time, receive the word, and afterwards, falling back, cast it away. It goes on: And some fell among thorns; by which are marked souls which care for many things. For thorns are cares.”