What does Hearing: Useless Alone mean in the Bible?

Dictionary

Charles Spurgeon's Illustration Collection - Hearing: Useless Alone
What a mistake to imagine that, by hearing first one preacher and then another, we can derive benefit to our souls! More is wanted than such hearing. A raven may fly from cage to cage, but it is not thereby changed into a dove. Go from room to room of the royal feast, and the sight of the tables will never stay thy hunger. Reader, the main thing is to have and hold the truth personally and inwardly; if this be not seen to, thou wilt die in thy sins, though ten thousand voices should direct thee to the way of salvation. Pity indeed is it that the bulk of hearers are hearers only, and are no more likely to go to heaven than the seats they sit on in the assembly of the saints.