Not all doctrines are equally important. They are equally true, but not all truth is equally important. It isn't a matter of some doctrines being "more true" than others, as if some doctrines are partially false. It is rather that some doctrines bear less impact than others on our capacity to know, love, and obey God.
Author: Sam Storms Source: Authority and Method in Theology, November 8, 2006
Doctrine matters. What you believe about God, the gospel, the nature of man, and every major truth addressed in Scripture filters down to every area of your life. You and I will never rise above our view of God and our understanding of His Word.
Author: John MacArthur Source: Grace to You, Newsletter: Aug. 14, 2007.
The basic task of the church is to teach sound doctrine. It is not to give one pastor's opinion, to recite tear-jerking illustrations that play on emotions, to raise funds, to present programs and entertainment, or to give weekly devotionals."
Doctrine is useless if it is not accompanied by a holy life. It is worse than useless; it does positive harm. Something of 'the image of Christ' must be seen and observed by others in our private life, and habits, and character, and doings.
Inability to distinguish doctrine is spreading far and wide, and so long as the preacher is "clever" and "earnest," hundreds seem to think it must be all right, and call you dreadfully "narrow and uncharitable" if you hint that he is unsound!
Now, in order that true religion may shine upon us, we ought to hold that it must take its beginning from heavenly doctrine and that no one can get even the slightest taste of right and sound doctrine unless he be a pupil of Scripture.
Author: John Calvin Source: Institutes, Scripture.
The foundation of true holiness and true Christian worship is the doctrine of the gospel, what we are to believe. So when Christian doctrine is neglected, forsaken, or corrupted, true holiness and worship will also be neglected, forsaken, and corrupted.
There is a direct line that runs from our doctrine to our actions, from what is in our minds to what is in our words and ways... The heart spills over into life. Thoughts of God, and of all else, erupt into acts. The filling of the heart with wise thoughts of God becomes the most important, the most practical, business in the world.
Author: Tom Wells Source: A Vision for Missions, p. 108-109.