The Song of the Gopis (from the Bhagavata). A unique prayer of nineteen inimitable slokas sung by the Gopis, the best exemplars of para-bhakti (supreme devotion).
Take up one idea. Make that one idea your life -- think of it, dream of it, live on that idea. Let the brain, muscles, nerves, every part of your body, be full of that idea, and just leave every other idea alone. This is the way to success, and this is the way great spiritual giants are produced. Others are mere talking machines.
-Swami Vivekananda