Song of Solomon 4:9
9 Thou hast ravished my heart, my sister, my spouse; thou hast ravished my heart with one of thine eyes, with one chain of thy neck.
sister
The word "sister" here is of infinitely delicate significance, intimating the very whiteness of purity in the midst of an ardour which is, like the shekinah, aglow but unspeakably holy. Sin has almost deprived us of the capacity even to stand with unshod feet before this burning bush.