Christian D. Ginsburg, The Kabbalah: its doctrines, development… (1920)
“ Such a service has also its merit, though in this case the union of the soul with the Deity is slight. There is only one degree which is higher than fear: it is love. In love is the mystery of the divine unity. It is love which unites the higher and lower degrees together; it elevates everything to that position where everything must be one. This is also the mystery of the words, ‘Hear O Israel, the Lord our God is one God.’ ” (Sohar, ii, 216 a.) ”
