The New Testament is the most popular collection. However, there are also non-canonical writings attributed to Paul as well as to other Christians.
There are numerous gospels, epistles and books of instruction, such as the Didache, that were not included in the New Testament. Some were certainly considered, while others were seen as too different in theology to be accepted.
If it's in the New Testament then it was part of the teaching of the early Christians since the New Testament authors were the early Christians. It is possible that the reference is to the absence of this from any recorded preaching or from any of Paul's doctrinal letters. A simple explanation exists for this. Such was not in dispute and so there was no need to discuss it. Many other accepted Christian doctrines were not discussed at times or only in passing as they were believed and so not needing to be elaborated on.
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Augustine
70% Roman Catholic15% Evangelical Christian Denominations15% Other Beliefs
The Bible.
cause
Early Christians refused to worship the Roman Gods. Virtually every other religion at the time was polytheistic (many gods), so when
B.S Luke has written: 'Asthma, hemicrania, warts and cancer and other writings' -- subject(s): Collected works, Homeopathy
Diwan Harish Chand has written: 'Cancerinic or cancerinic state and other writings' -- subject(s): Collected works, Homeopathy
They feared persecution for their faith
Becausea) Christianity was brought to Kerala by St. Thomas the apostle of Christ.b) Early church in Kerala used Syriac (or Suriyani) was the language in the Church. Probably introduced through their interactions with early Christians in Persia, Armenia, etc.c) Early Kerala Christian rituals resembled more with the "Eastern rituals", than European Christians rituals.Essentially they are Christians like any other Christians, "Syrian" just points to their historical Christian heritage, which is different from how Christianity arrived in the rest of India.
When Christians show love for each other, God is there. Christians were quite cohesive and supportive of one another, and that helped spread the faith--it still does.
The early inscribings of the Odyssey and other such narratives are possibly the first writings, but the first book was the bible.
Buddhism has no official , one and only, divinely inspired holy book like Christians, Jews and Moslems. There are several sutras and other religious writings for inspiration and instruction.
some people who want to discredit "other religious beliefs" will read the other writings to make an argument for their chosen belief. Christian leaders advise christians to know the bible well so as to refute any would be challengers.
The Bible in whole is used and treated as holy scripture by Christians and has been hijacked by several other cult groups throughout history. The Jewish Torah consists of the Old Testament and several other writings. The Q'uran, as I understand it, includes similar records as the Torah, and is likely based on the same originals. All other religions have their own texts, or no common writings used.