Sri Ramakrishna’s life was a unique field of Mother Kali’s sport. The extensive, diverse and meaningful way in which Shakti sadhana expressed itself in Sri Ramakrishna’s life was never before seen in any other aspirant. When he was young, he fell into a trance on the way while visiting Vishalakshi of Anur. He had a unique vision then. From then on his life took a different turn. From the day he began worshipping Mother Kali at Dakshineswar, the deeper, expansive and intensive sides of his Mother worship came to the fore. He had heard that ‘When pleased, She is the giver of liberation to human beings.’ (14) He understood that unless the Divine Mother cleared the way, there could be no God-realization. Thus he pleased the Divine Mother with his purity and intense aspiration, and attained Her vision. He did not rest with the Divine Mother’s vision; he also practised other Shakti disciplines through various moods. He moved about freely in the world of sadhana, becoming an instrument in the hands of the Divine Mother.
Under the directions of Yogeshvari Brahmani, Sri Ramakrishna practised all the sixty-four Tantric disciplines. There is a subtle intermingling of moods in these sixty-four methods. Gradually, he scaled the highest pinnacle of these methods of sadhana. Thereafter, he undertook Advaita sadhana under the tutelage of Totapuri. Being established in Advaitic knowledge, Sri Ramakrishna entered into the mood of the vijnani and remained a child of the Divine Mother. Coming down from nirvikalpa samadhi, he began enjoying the attitudes of devotee and devotion. The Brahmo leader Pratap Chandra Mazumdar wrote about Sri Ramakrishna: ‘He worships Shiva, he worships Kali, he worships Rama, he worships Krishna, and is a confirmed advocate of Vedantist doctrines. He is an idolater and is yet a faithful and most devoted meditator of the perfections of the one, formless, infinite Deity, whom he terms Akhanda Satchidananda.’ According to Sri Ramakrishna, there is no difference between Kali, Krishna and Shiva. According to the Sammohana Tantra, he who distinguishes between Rama and Shiva is an idiot.
(Excerpted from 'Shakti Worship and Sri Ramakrishna' by Swami Abhedananda, Vedanta(dot)ru)
