Page "Keshub Chunder Sen" Paragraph 39
But his religion in developed form, as we find it, in his Navavidhan, is full of concrete symbols of all religions .... Every Hindu is conscious of the underlying unity of this universalism.
Read the devotional poems of the Vaishnavas, read the devotional poems of the Shaktas and the other sects, you will find they were identical in this character.
The life and work of Keshub Chunder Sen also point to attempt after attempt at this very universalism .... The result may or may not be considered satisfactory.