The source of all life and knowledge is in # man and # woman , and the source of all living is in the interchange and the meeting and mingling of these two: man-life and woman-life, man-knowledge and woman-knowledge , man-being and woman-being.
D. H. Lawrence, George J. Zytaruk, James T. Boulton (2002). “The Letters of D. H. Lawrence”, p.181, Cambridge University Press