The February 1886 issue of The Christian Science Journal reported on Eddy's sermon given on January 24, 1886 on p. 210:

“January 24, the pastor, Mrs. Eddy, preached, for the first time in several months. The hall was full, despite the cold snowstorm, and many stayed after service to greet the preacher. The hymn heralded the sermon, which was on the text, Revelation xxi. 16, “The city lieth four-square.”Rev 21:16 And the city lieth foursquare, and the length is as large as the breadth: and he measured the city with the reed, twelve thousand furlongs. The length and the breadth and the height of it are equal. The holy city is Christian Science, enclosed by four equal and impartial sides: 1. The Bible; 2. Jesus; 3. Christianity; 4. Science. These lines run into each other, and in its way the square is as complete as the circle. The aim of the discourse was to show how Christian Science is in harmony, when rightly understood, with the four sacred influences represented by these four sides of spiritual and historic Truth.”

“In leaving home, the speaker was so unfortunate as to mislay her manuscript; but she bravely overcame this embarrassment, and spoke to such acceptance that many will be glad to know that the pith of the sermon is embodied in a chapter of the forthcoming edition of her book, Science and Health.”