High-flying professors!

From Spurgeon's sermon, "The Fruitless Vine"

Judge what I say-
if you were put into the sieve this night,
how many of you would come out clean in this matter?

Are there not many high-flying professors here,
who fly high, but who do nothing?
who can talk fast, but live as slowly as you like?
who, perhaps, delight in hearing the truth, but who never practice
the truth in serving their God, nor living to his honor?

Such as you, sirs, are the most useless and
worthless of all creatures in the world!

For you would be honorable if you were fruitful; but without
fruit, you are good for nothing but to be cast out and burned!