“When doctrine fails to relate to life, it becomes an argument against the truth of Christianity.” -Kevin Vanhoozer
“We have trusted in Jesus. But how far can we trust him? Just in this transitory life? Just in this little speck that we call the earth? If we can trust him only thus far we are of all men most miserable. We are surrounded by stupendous forces; we are surrounded by the immensity of the unknown. After our little span of life there is a shelving brink with the infinite beyond. And still we are subject to fear—not only fear of destruction but a more dreadful fear of meeting with the infinite and holy God. So we should be if we had but a human Christ. But now is Christ our Savior, the one who says, “Your sins are forgiven,” revealed as very God. And we believe. Such a faith is a mystery to us who possess it; it seems folly to those who have it not. But if possessed it delivers us forever from fear. The world to us is all unknown; it is engulfed in an ocean of infinity. But it contains no mysteries to our Savior. He is on the throne. He pervades the remotest bounds. He inhabits infinity. With such a Savior we are safe.” -J. Gresham Machen, The Person of Jesus: Radio Addresses on the Deity of the Savior
“God wants to deal with us in our situation of time and place, as he dealt with the biblical characters in theirs. So to understand his ways with us, we must understand his ways with them.” -John Stott, Understanding the Bible
Herman Bavinck discusses the development of Dogmatics (RD I.34-35). He says that with the Reformation, the practical side of the dogmatics started to shine through more. Dogmatics was concerned with “living for God through Christ, [and] religion, [and] the worship of God.” Modern liberalism pushed this too the extreme, and made it so faith was exclusively concerned with the practical, and without any fixed body of truths to norm it.
BTW NOTE: Reformed theology isn’t against being practical. It aims to keep a balance between theory and practice.
“Every Christian should be both conservative and radical; conservative in preserving the faith and radical in applying it.” -John Stott