for each tree is known by its own fruit. For figs are not gathered from thorn plants, nor are grapes harvested from thorn bushes.

Others fell among thorn bushes, and the thorn bushes grew with them and choked them.

The ones that fell among the thorn bushes are the people who listen, but as they go on their way they are choked by the worries, wealth, and pleasures of life, and their fruit doesn't mature.