Devotion to one, is Devotion to All

From the Art and Science of Raja Yoga:

The bhakti yogi thinks of God first in personal, human terms: as Father, Mother, Friend or Beloved. Such a personal view helps him to awaken an direct love towards God. Ignorant followers of this path waste much energy in arguing over the respective merits of their chosen deities. They see not that Spirit is all forms, and no form (because essentially beyond all forms.) It is not what we love, but how we love, that is important if our devotion is to lead us to enlightenment.