About the year 1864, there came to Dakshineswar a wandering Vaishnava monk, Jatadhari, whose Ideal Deity was Rama. He always carried with him a small metal image of the Deity, which he called by the endearing name of Ramlala, the Boy Rama. Toward this little image he displayed the tender affection of Kausalya for her divine Son, Rama. As a result of lifelong spiritual practice he had actually found in the metal image the presence of his Ideal. Ramlala was no longer for him a metal image, but the living God. He devoted himself to nursing Rama, feeding Rama, playing with Rama, taking Rama for a walk, and bathing Rama. And he found that the image responded to his love.
Sri Ramakrishna, much impressed with his devotion, requested Jatadhari to spend a few days at Dakshineswar. Soon Ramlala became the favourite companion of Sri Ramakrishna too. Later on he described to the devotees how the little image would dance gracefully before him, jump on his back, insist on being taken in his arms, run to the fields in the sun, pluck flowers from the bushes, and play pranks like a naughty boy. A very sweet relationship sprang up between him and Ramlala, for whom he felt the love of a mother.
One day Jatadhari requested Sri Ramakrishna to keep the image and bade him adieu with tearful eyes. He declared that Ramlala had fulfilled his innermost prayer and that he now had no more need of formal worship. A few days later Sri Ramakrishna was blessed through Ramlala with a vision of Ramachandra, whereby he realized that the Rama of the Ramayana, the son of Dasaratha, pervades the whole universe as Spirit and Consciousness; that He is its Creator, Sustainer, and Destroyer; that, in still another aspect, He is the transcendental Brahman, without form, attribute, or name.
(from the Introduction to Sri Ramakrishna, Gospel of Sri Ramakrishna)