Christianity is not a religion. It is built on faith and faith alone which comes from God and God alone. In fact it is built on people telling how Jesus Christ died on a cross to take away their sin and here ends the Gospel because it takes nothing else to bring a person to salvation. God brings that person to the point where he or she realises that they need Jesus Christ's action on the cross to take the yoke of sin from off them and as a consequence be born again. It's all of God, Father, Son and Holy Spirit and it's the greatest experience any person can go through.
Religion on the other hand is a huge conglomeration of various ideas made by man and supported by idols to try to authenticate what it is they believe. Sadly most of it emanates from the Bible stories going all the way back to Nimrod as it was in his name the first religion came about being called the Chaldean mysteries.