For many years he had known and believed the truth, but his views of Christ had been rather sought in the reflection of the inward work of the Holy Spirit in his heart than in the contemplation of the finished righteousness of Christ, and he had neither peace nor joy in believing …At last, to use his own earnest words in a remarkable letter published by John Newton, “The cloud which covered the mercy-seat fled away, Jesus appeared as he is! My eyes were not turned inward, but outward, The Gospel was the glass in which I beheld him …. I now stand upon a shore of comparative rest. Believing, I rejoice. When in search of comfort, I resort to the testimony of God; this is the field which contains the pearl of great price. Frames and feelings are, like other created comforts, passing away. What an unutterable source of consolation it is that the foundation of our faith and hope, is ever immutably the same! – the sacrifice of Jesus as acceptable and pleasing to the Father as ever it was! … Formerly the major part of my thoughts centred either upon the darkness I felt or the light I enjoyed. Now they are mainly directed to Jesus, what he hath done, suffered, and promised.”
[From Alexander Haldane, Lives of Robert and James Haldane, speaking of a testimony given by and Edinburgh merchant by the name of John Campbell. Quoted in Iain Murray, The Old Evangelicalism, p. 191).