SRI RAMAKRISHNA (to Kedar and other devotees): “Bhakti (devotion) is the one essential thing. To be sure, God exists in all beings. Who, then, is a devotee? He whose mind dwells on God. But this is not possible as
long as one has egotism and vanity. The water of God’s grace cannot collect on the high mound of egotism. It runs down. I am a mere machine.
"God can be realized through all paths. All religions are true. The important thing is to reach the roof. You can reach it by stone stairs or by wooden stairs or by bamboo steps or by a rope. You can also climb up by a bamboo pole.
“You may say that there are many errors and superstitions in another religion. I should reply: Suppose there are. Every religion has errors. Everyone thinks that his watch alone gives the correct time. It is enough to have yearning for God. It is enough to love Him and feel attracted to Him: Don’t you know that God is the Inner Guide? He sees the longing of our heart and the yearning of our soul. Suppose a man has several sons. The older boys address him distinctly as ‘Baba’ or ‘Papa’, but the babies can at best call him ‘Ba’ or ‘Pa’. Now, will the father be angry with those who address him in this indistinct way? The father knows that they too are calling him, only they cannot pronounce his name well. All children are the same to the father. Likewise, the devotees call on God alone, though by different names. They call on one Person only. God is one, but His names are many.”
~(Gospel of Sri Ramakrishna, chapter 4)_
SRI RAMAKRISHNA: “One should not think, ‘My religion alone is the right path and other religions are false.’ God can be realized by means of all paths. It is enough to have sincere yearning for God. Infinite are the paths and infinite the opinions.”
~(Gospel of Sri Ramakrishna, chapter 6)
SRI RAMAKRISHNA (To the goswami:) “With sincerity and earnestness one can realize God through all religions. The Vaishnavas will realize God, and so will the Saktas, the Vedantists, and the Brahmos. The Mussalmans and Christians will realize Him too. All will certainly realize God if they are earnest and sincere.
“Some people indulge in quarrels, saying, ‘One cannot attain anything unless one worships our Krishna’, or, ‘Nothing can be gained without the worship of Kali, our Divine Mother’, or, ‘One cannot be saved without accepting the Christian religion.’ This is pure dogmatism. The dogmatist says, ‘My religion alone is true, and the religions of others are false.’ This is a bad attitude. God can be reached by different paths.”
~(Gospel of Sri Ramakrishna, chapter 8)