If you are speaking to me, I did not mention the Bible alone as the source:
"And they continued stedfastly in the apostles' doctrine and fellowship, and in breaking of bread, and in prayers." Acts 2:42
"Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me." John 14:6
"Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved." Acts 4:12
"But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you." John 14:26