From Tattva-sutra 7, Srila Bhaktivinoda quotes: ‘Energy is dependent; so energy is imagined as a female and thus she has become qualified to be embraced by the supreme energetic. To make the truth more easily understood great sages have added ornamental language to their descriptions. Actually, Radha-Krsna is one Absolute Truth.’ (from Sri Bhaktivinoda Vani Vaibhava, translated by Bhumupati dasa)