by Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura Prabhupāda
In reality, it is impossible to serve effectively unless one is directly cognizant of the emotions deep within the heart of the person being served. Sometimes, the topmost servants may wait for the orders of their master, but other times, aware of the inner feelings of their worshipful lord, they may serve him without being ordered....