Commentary of Charles Spurgeon, Adam Clarke & Matthew Henry
saith the LORD;
and like a hammer that breaketh the rock in pieces?
Therefore, behold,
I am against the prophets,
saith the LORD,
that steal my words every one from his neighbor.
Vs.29,30
Is not my word like a fire, saith the Lord? -
Q: Is their
word so?
Q: Has it the power and efficacy that the word of God has?
A: No; nothing
like it; there is no more comparison than between painted fire and real fire.
Theirs is like an ignis fatuus—a deceiving meteor, leading men into
by-paths and dangerous precipices. 
Note, The word of God is like fire.
The law
was a fiery law (Deu. 33:2), and of the gospel Christ says, I have come to
send fire on the earth, Lu. 12:49. The word of him who has his commission from heaven shall be as a fire and as a hammer;
sinners shall be convinced and converted to God by it.
But the others,
though they steal the word from their neighbor-borrow or pilfer a good
sermon, yet they do not profit the people at all, because God did not
send them.
a hammer breaking the rock in pieces - The
unhumbled heart of man is like a rock;
---if it will not be melted by the word of
God as the fire,
---it will be broken to pieces by it as the hammer.
Whatever
opposition is given to the word, it will be borne down and broken to pieces.
Fire has different effects, according as
the matter is on which it works;
--it hardens clay, but softens wax;
--it consumes
the dross, but purifies the gold.
