1)The Holy Spirit Is the First Person Of the Holy Trinity to be mentioned in the Holy Bible (Genesis chapter 1, verse 2). 2)Christ Is Literally Present in the Holy Eucharist (Bread and Wine) in all the Catholic & Orthodox Churches in the world. read more
The doctrine of the Trinity is accepted by all "mainstream" branches of Christianity (Catholic, Eastern Orthodox, Protestant and Anglican) and in fact is one of the major defining factors for what is considered mainstream. read more