The Bible doesn't mention many other theological terms, but that does not meant these terms are not biblical.Re. The Bible doesn't mention the concept of the Trinity either.For centuries, Christians have coined terms which summarize and/or explain certain biblical concepts. The word Trinity is one example. You can find several others by examining a good glossary of Christian terms, such as the one found HERE.
The doctrine of the Trinity is found in numerous places throughout scripture. The teaching is so unequivocal every Christian denomination, Protestant, Catholic and Orthodox, accepts the Trinity as a fundamental tenet.Re. This doctrine was enacted by church leaders 200 years after the death of Christ at the Council of Nicea.There are many excellent references which address this topic. I recommend you start HERE.
This doctrine was proclaimed by the Bible centuries before the birth of Christ. It was taught and affirmed throughout the New Testament. It was practiced by the Body of Christ 200 years prior to the Council of Nicea.Re. Yet most churches consider it Gospel.
According to every Christian sect, the term Gospel refers to the first four books of the New Testament.As noted above, every Christian sect supports the doctrine of the Holy Trinity.
ROFLOL!