Cardiphonia; or, The Utterance of the Heart, in the Course of a Real Correspondence (Philadelphia: Presbyterian Board of Publication), Letter I to Mrs. G., p. 248

The doubts and fears you speak of, are, in a greater or less degree, the common experience of all the Lord's people, at least for a time. Whilst any unbelief remains in the heart, and Satan is permitted to tempt, we shal…