Cao Dai Temple
Reason for the founding of Cao Dai: (From the official Cao Dai website)
Each time that human beings suffered when societies became chaotic, a religion was founded. For millenia, human beings have been blessed by having many forms of religion such as Hinduism, Judaism, Zoroasterianism, Buddhism, Taoism, Confucianism, Christianity, Islam, et cetera. One always observes one same truth through religions, even when they are so physically different and founded at different times and places.
The truth is the existence of a Creator of all the universe and living beings, the existence of the Supreme Being who reigns in everyone's heart. Religions have called this Supreme Being by different names: Macrocosm by Hinduism, Yahweh by Judaism, Ahura Mazda by Zoroasterianism, Tao by Taoism, Monad by Confucianism, Allah by Islam, or simply "God" by a myriad of English speaking religious persons.
Then with time, the truth gets corrupted and diluted. Human beings have a tendency toward materialism. They discriminate against each other because of physical differences between religions; they fight, and kill each other under the form of religious wars; the relationship between parents and children, husband and wife, brothers and sisters, friends, becomes controlled by material desires and money. Universal philosophies such as Baha'i, Theosophy, and Oomoto Foundation were created, trying to connect the Eastern and Western religions.
In 1926 the Supreme Being founded CaoDai in Vietnam to show people that all religions are indeed of one same origin. In 1926, the Supreme Being gave the following message:
Nhien Dang Co Phat (Dipankara, an old time Buddha) is Me,
Sakya Muni is Me,
Thai Thuong Nguon Thi (an old time Immortal) is Me,
Who is Cao Dai.
In founding Cao Dai, the Supreme Being teaches man to realize that all religions have one same origin, and not to discriminate against each other but to love each other as brother and sister, to cultivate self to find God in one's heart.