Mainstream versus First Century Christianity

Mainstream Christianity First Century Christianity
Go to church on Sunday or Keep the Sabbath
Sunday, Christmas, Easter or The Holy Days of the Bible
Dead people are now spirits or Dead people are dead awaiting resurrection
Trinity is mandatory or Accepting Yeshua as the Messiah and Son of God is the key to life
Works optional/not required or Repentance and change mandatory
Goal of life is going to heaven or Being in a better resurrection/the kingdom of God/ the Olam Haba
Old Testament for reference onlyor The Old Testament was the only bible they had for decades
Christianity is a different/new religion pr Christianity is the continuation of the faith of Abraham, Isaac, and Jacob