The Doctrine of Revelation
by A.W. Pink
Studies in the Scriptures January, 1947
"...2 Timothy 3:16-17 mentions some of the principal uses and values, which the sacred Scriptures possess for us; and the first mentioned is that they are "profitable for doctrine." There is an inseparable connection between doctrine and deportment: our convictions mould our characters; what we believe largely determines how we act—"For as he thinketh in his heart, so is he" (Pro 23:7). To be soundly indoctrinated and to be well grounded in the Truth is one and the same thing; and nothing but the Truth operating in the soul will preserve from error—either theoretical or practical. Of the primitive Christians, it is said, "They continued steadfastly  in the apostles' doctrine and  fellowship, and  in breaking of bread, and  in prayers" (Act 2:42)—which at once indicates that they es teemed soundness in the Faith as of first importance; and were of a radically different spirit from those who are so indifferent to the fundamentals of Christi anity—who insinuate, if not openly say, "It matters little what a man believes if his life be good."
The relation between sound doctrine and godly deportment is like unto that between the bones and flesh of the body, or between the tree and the fruit which it bears: the latter cannot exist without the former. The first epistle of the New Testament exemplifies our remark: three-fourths of it is occupied with a laying down of the essentials of Christianity; ere the apostle shows what is the requi site for the adornment of the Christian character. The history of Christendom during the last four centuries strikingly illustrates our contention. Examine the writings of the Reformers, and what do you find? Why, that exposition of doc trine held the foremost place in their ministry: that was the light which God used to deliver so great a part of Europe from the popish ignorance and super stition which characterized "the dark ages"! The moral tendency upon the masses, and the spiritual blessings communicated to God's people by doctrinal preaching, appear in the time of the Puritans. Since that day—in proportion as the churches have departed from their doctrinal fidelity and zeal—has close walking with God, purity and uprightness before men, and morality in the masses declined."