Religion of Hindu

To the Hindu, then, the whole world of religions is only a travelling, a coming
up, of different men and women, through various conditions and
circumstances, to the same goal. Every religion is only evolving a God out of
the material man, and the same God is the inspirer of all of them. Why, then,
are there so many contradictions? They are only apparent, says the Hindu. The
contradictions come from the same truth adapting itself to the varying
circumstances of different natures.
It is the same light coming through glasses of different colours. And these little
variations are necessary for purposes of adaptation. But in the heart of
everything the same truth reigns. The Lord has declared to the Hindu in His
incarnation as Krishna, "I am in every religion as the thread through a string of
pearls. Wherever thou seest extraordinary holiness and extraordinary power
raising and purifying humanity, know thou that I am there." And what has been
the result? I challenge the world to find, throughout the whole system of
Sanskrit philosophy, any such expression as that the Hindu alone will be saved
and not others. Says Vyasa, "We find perfect men even beyond the pale of our
caste and creed." One thing more. How, then, can the Hindu, whose whole
fabric of thought centres in God, believe in Buddhism which is agnostic, or in
Jainism which is atheistic?

[Swami Vivekananda : Complete Works of Swami Vivekananda]