Sri Ramakrishna: "Bhakti, love of God, is the essence of all spiritual discipline. Through love one acquires renunciation and discrimination naturally."
Narendra (Swami Vivekananda): "Isn't it true that the Tantra prescribes spiritual discipline in the company of woman?"
Sri Ramakrishna: "That is not desirable. It is a very difficult path and often causes the aspirant's downfall. There are three such kinds of discipline. One may regard woman (Woman is the symbol of the Divine Mother.) as one's mistress or look on oneself as her handmaid or as her child. I look on woman as my mother. To look on oneself as her handmaid is also good; but it is extremely difficult to practise spiritual discipline looking on woman as one's mistress. To regard oneself as her child is a very pure attitude."
Sri Ramakrishna: "Nothing is impossible for God. Nobody can describe His nature in words. Everything is possible for Him. There lived at a certain place two yogis who were practising spiritual discipline. The sage Narada was passing that way one day. Realizing who he was, one of the yogis said: 'You have just come from God Himself. What is He doing now?' Narada replied, 'Why, I saw Him making camels and elephants pass and repass through the eye of a needle.' At this the yogi said: 'Is that anything to wonder at? Everything is possible for God.' But the other yogi said: 'What? Making elephants pass through the eye of a needle — is that ever possible? You have never been to the Lord's dwelling-place.”
Source: Gospel of Sri Ramakrishna