Another class of ministers have preached the precepts and
little else. We want these men as we want the others, they
are all useful, and act as antidotes to each other, but their
ministries are not complete. If you hear preaching about
duty and command, it is very proper, but if it be the one sole
theme the teaching becomes very legal in the long run; and
after a while the true gospel which has the power to make us
keep the precept gets flung into the background, and the
precept is not kept after all. Do, do, do, generally ends in
nothing being done.
Spurgeon
The Man of One Subject
from Charles Haddon Spurgeon's sermon titled "The Man of One Subject", preached on October 31, 1875, at the Metropolitan Tabernacle. It is based on 1 Corinthians 2:2 ("For I determined not to know any thing among you, save Jesus Christ, and him crucified").