These are great words from a great book by Louis Berkhof: Assurance of Faith.
“It was one of the great mistakes of the Pietism of the seventeenth and eighteenth centuries that, in seeking the assurance of faith, or of salvation, it divorced itself too much from the Word of God. The basis of assurance was sought, not in the objective promises of the gospel, but in the subjective experiences of believers. The knowledge of the experiences that were made the touch-stone of faith, was not not gathered from the Word of God, but was obtained by an inductive study of the subjective states and affections of believers.”
“In many cases these were not even put to the test of Scripture, so that the true was not always distinguished from the counterfeit. Moreover, there were unwarranted generalizations. Individual experiences and experiences of a very dubious character were often made normative, were set forth as the necessary marks of true faith. The result was that they who were concerned about the welfare of their soul turned attention to themselves rather than to the Word of God, and spent their life in morbid introspection.”
“It is no wonder this method did not promote the assurance of faith that fills the heart with heavenly joy, but rather engendered doubt and uncertainty and caused the soul to grope about in a labyrinth of anxious questionings, without and Ariadne-thread (string) to lead it out. This method of seeking assurance by looking within rather than by looking without, to Jesus Christ as he is presented in Scripture, and by making the experiences of others, especially of those who are regarded as ‘oaks of righteousness’ normative, has not yet been abandoned entirely in our circles. Yet it [this method] is a most disappointing one.”
“If we would have the assurance of faith, the first great requisite is that we make a diligent study of the Bible, and more particularly of the glorious promises of forgiveness and salvation. After all it is only in the Word of God and in the living Christ, as he is mirrored in the Word, that we find the objective basis for the assurance of grace and perseverance to the end. The free promises of God are the foundation of our faith, and it is only on the strength of these that we place our trust in Christ as our Savor. These promises are absolutely reliable and have their confirmation in Christ (2 Cor. 1:20). These promises are not only sure, but also unconditional, i.e. they are not conditioned by any work of man.”
Well said. If you don’t have all the feelings, emotions, and spiritual experiences of other Christians, don’t despair. Feelings, emotions, and spiritual experiences didn’t die on the cross for us; they cannot save us – Jesus did, he can and does. If you truly trust in him you are saved, even if you don’t always feel it. In other words, solid assurance has to do with an empty tomb, not an emotional fervor.