It is from the Shechinah that all the lower worlds extend with all the different aspects of service they contain – that of the angels and that of the souls. The function of the angels is to execute the commands of the Shechinah while the souls are to serve the Holy One, blessed be He, through their free will. She is therefore said to be incomplete and unable to couple except when all these different branches of hers are contained within her in accordance with their respective functions. And then through their combined power Coupling takes place with all the worlds repaired.