Are the Baha’i’s really the first people to have brought this principle forward to the ears of the world? `Abdu’l-Bahā claims:
Another new principle revealed by Bahā’u’llāh is the injunction to investigate truth—that is to say, no man should blindly follow his ancestors and forefathers. Nay, each must see with his own eyes, hear with his own ears and investigate the truth himself in order that he may follow the truth instead of blind acquiescence and imitation of ancestral beliefs.
That which is propagated in Baha’i teachings as seeking the truth—which the Baha’i’s pride themselves in having discovered—is in reality an innate principle that has come in the books of different religions and can clearly be seen in the works of different philosophers.
It is clearly evident that this principle is not a new discovery or novel innovation of Baha’ism. Rather, all schools of thought and all of the Divine Religions call upon people to seek what is right, say what is right, and accept what is right. There are examples in books of previous dispensations that show this concept. For example, in the Avesta, the Holy Book of the Zoroastrians, it has come that:
“Hear with your ears the best things; look upon them with clear-seeing thought, for the decision between the two Beliefs, each man for himself before the Great consummation, bethinking you that it be accomplished to our pleasure.”
In the Torah, the Holy Book of the Jews, we read:
“Thus saith Jehovah, stand ye in the ways and see, and ask for the old paths, where is the good way; and walk therein, and ye shall find rest for your souls.”
It is mentioned in the Bible:
“Prove all things; Hold fast that which is good; Abstain from every form of evil.”
The Holy Quran says:
“Give good tiding to My servants. [Those] Who listen to speech and follow the best of it. Those are the ones God has guided, and those are people of understanding.”
Even though `Abdu’l-Bahā had claimed this principle was new and revealed by his father, elsewhere he confesses that this principle is not new:
“His Highness Moses spread the truth as did his Highness Jesus and his Highness Abraham and his Highness the Messenger (meaning the Prophet Muḥammad) and his Highness the Bāb and his Highness Bahā’u’llāh. They all established and spread the truth.
The above true examples clearly highlight the fact that Baha’is pull wool over the world’s eyes while claiming that this is a novel principle exclusive to their faith.
 `Abdu’l-Bahā, The Promulgation of Universal Peace, p. 454.
 Avesta, Translated by L. H. Mills, vol. 1, Ahunavaiti Gatha, Yasna, chap. 30, verse 2 (Sacred Books of the East [American Edition, 1898], http://avesta.org/yasna/yasna.htm#y30)
 The Old Testament, The Book of Jeremiah, chap. 6, verse 16 (American Standard Version).
 The New Testament (American Standard Version), Thess. 5:21–22.
 Quran (Sahih International), 39:17-18.
 `Abdu’l-Bahā, Khaṭābāt (Tehran), vol. 2, p. 5.