B. G. Jefferis and J. L. Nichols, Searchlights on Health — Chastity and Purity of Character (1919)
“ THE SECOND LESSON.—The second lesson came with the question, "But where is the nest?" The ice is now broken, as it were; it was an easy matter for the mother to say, "The nest in which you grew, dear, was close to your mother's heart inside her body. All things that do not grow inside the egg itself, and which are kept warm by the mother's body, begin to grow from the egg in a nest inside the mother's body." ”
