After the first four words of the blessing have been said, Kindness, Strength, and Beauty are blessed. They take that blessing as a source of strength, unite themselves together, and return to their source, the Foundation of the Supernal Mother.
Without the blessing, they lack the strength to go back. However, with the blessing, they become cleansed of the external influences and receive additional blessings, true blessings, three blessings, since now the three of them are united. They then take these blessings back to the lower spheres. This is hinted to in the verse “You will not see My Face empty-handed.”
Art: Jozef Israels - Three Women Knitting By The Sea