Mark 4:17
But since they have no root, they last only a short time. When trouble or persecution comes because of the word, they quickly fall away — the rootlessness is the rocky-ground person's defining characteristic, and it only becomes visible under pressure. The shallow response looks exactly like a deep response until the pressure test reveals the difference. When trouble or persecution comes because of the word — the persecution is specifically because of the word, not general life difficulty. The word itself is the reason for the persecution: those who identify with the kingdom face the same opposition that Jesus faces. The shallow-rooted fall away quickly when this cost becomes apparent.