William Burkitt on John 15:6

Here our holy Lord discovers the sad and deplorable condition of such professors, who pretending relation to Christ, do yet bring forth no fruit unto him: he calls them withered branches, fit only for the fire.

Learn hence, That such as have had a long standing in God's vineyard, and contented themselves with a withered profession, are in great danger of having God's blasting added to their barrenness. All their parts and gifts, and common graces, will wither, and their fair blossoms of profession will drop off, and at the great day the angels will gather these fruitless branches together, and cast them into hell-fire.