Madhvaon Brahma Sūtra 3.3.56

Even as the mantras referring to all the gods are studied, there is no objection to contemplating the qualities of the lower gods as present in the higher. The Brihat Tantra has the following: “ The contemplation of the gods related to the limbs of the Supreme Person should be made, regarding them as the attendants of the Supreme. Only when special objects are to be gained, he due comprehension of attributes is allowed, but not otherwise; or the permission concerns particular indivi- duals as the case may be (according to the fitness of the person seeking such objects).”