This bani, So Purkh, creates a sacred space in which grace prevails so as to allow the greatness of the soul to come forth. It was written by Guru Ram Das, whose vibration exists holding a state of grace and love that heals all realms of the heart and being.
Yogi Bhajan taught that if a woman recites this bani eleven times a day for any man, it has the power to make him a saint and dissolve any negativity between them. He would often give this as a sadhana to women for the men in their lives. So Purkh is part of Rehiraas, the evening prayer of the Sikhs.
"Woman is the molder of time, the molder of space and of man: the man of tomorrow, the child; the man of today, the husband, and the men of yesterday, the ancestors. The entire society, in theory and in reality is based on the spirit of the woman." - Yogi Bhajan