73. Of all the principles to which I have been made to adhere firmly, there is one that has specifically been revealed to me by God Himself. That principle is to desist from declaring false in essence, such religions as have been revealed by God through His prophets and which have the following characteristics. They have met with wide acceptance in certain regions of the world; having survived all challenges, they have become well established and deeply rooted. Having stood the test of time for long, they have acquired a measure of age and an air of permanence. According to this principle, such religions are essentially true and their founders were most certainly true prophets of God.
(Tohfa Qaisariya: Roohani Khaza'in Vol. 12, p 256)
74. This is a most attractive and peace giving principle which provides the basis for reconciliation amongst nations and promotes better moral conduct. This principle teaches us to believe in the truth of all prophets wherever they might have appeared; in India, Persia or China or any other country and for whom God has filled the hearts of millions of people with awe and deep respect and has caused their religions to be firmly rooted.
(Tohfa Qaisariya: Roohani Khaza'in Vol. 12, p 259)