All prophets are messengers of God. They are great Yogins and realized souls, who have had divine, intuitive perception of God. Their words are infallible and sacred. All contain the essence of divine wisdom. Ahuramazda, Isvara, Allah, Jehovah are different names for one God.
Truth is one, homogeneous, eternal substance.
The follower of the religion of Truth walks on the path of light, peace, wisdom, power and bliss. Man forgets all about his religion on account of ignorance, or lust for power and greed. He has become irreligious. So he has come down to the level of a brute. He has lost all sense of morality.