These passages on the role of bhakti (love and devotion) are from the book, Radhasoami Mat Prakash, by Huzur Maharaj (Rai Saligram).
Radhasoami Mat Prakash means: “Light (Prakash) on the Teachings (Mat) of the Lord of the Soul (Radhasoami)”. It was composed in English by Huzur Maharaj, and was the very first Sant Mat publication to appear in the English language, slightly over a century ago. It still serves as a most excellent introduction to the path.
”Knowledge without love for the Supreme Being is futile and tends towards untruth or darkness or materialism, while love turns everything to good use and leads to enlightenment and truth.” (Huzur Maharaj)
“The Supreme Being, being a boundless ocean of spirit or love; and, human being, being a drop or current of spirit or love from this ocean; and, love being the very essence and means of existence of the whole creation, it follows that no effort in any direction, temporal or spiritual, unless actuated by love or affectionate regard, can be crowned with success, and, the work or labour rendered easy, sweet and harmonious. Love is most sublime, having its origin in the highest region, the abode of the Supreme Being. In whatever heart it sprang up, it will gradually raise and carry the fortunate possessor of this lofty and noble passion to the highest region.” (Huzur Maharaj, Radhasoami Mat Prakash)
“A heart devoid of love or affection is as hard as stone, and does not form a suitable receptacle for the light of Heavenly Grace and Mercy.” (Huzur Maharaj)
”This practice can be conducted easily and comfortably if the devotee has a little love for the Supreme Being. Without love it will be too hard and difficult to practice Surat-Shabd-Yoga [inner Light and Sound Meditation] with any good result to be obtained within a short time.” (Huzur Maharaj)
”Where pure love dwells, there sheds the light of Grace, as it forms a link with the spirit or love current from its Source, the Supreme Being.” (Huzur Maharaj)
This book is online:
Huzur Maharaj’s teachings about bhakti (love and devotion) in Radhasoami Mat Prakash very much reminds me of a discourse by Baba Devi Sahab on bhakti: http://www.sadgurumehi.com/satsangSudha/babaDevi/devotion.html Both spiritual masters knew each other. Baba Devi Sahab spent some time in Agra.