Let's talk about what the Bible has to say about the Holy Ghost.
"He said unto them, Have ye received the Holy Ghost since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost. And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism. Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus. When they heard this, they were baptized in the name of the Lord Jesus. And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied." -Acts 19:2-6 Bible.com/app
Believing isn't enough to be saved, it's only a part. Even Satan and his demons believe in God. The scripture clearly asks if you received the Holy Ghost since you first believed. Why would it ask if it wasn't important? In the scripture they were baptized in Jesus name. And when they received the Holy Ghost they spoke in tongues, which is the evidence of receiving the Holy Ghost.
Still need more proof? Keep reading...
A little about tongues.
37Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do? 38Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. 39For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call. - Acts 2:37-39
God hasn't stopped calling people! If you say you're a preacher than you'll often say/hear that you're CALLED of God. God has CALLED us to be His followers that means me, that means you. Saint or sinner you were CALLED. We are CALLED, we are chosen!
Someone, some average Joe, somewhere in history decided that the Holy Ghost and Baptism weren't necessary. But see the scripture below!
"Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom
Notice I didn't say it, my Pastor didn't say it. JESUS said it! Born of the water = baptism. Born of the Spirit = Receiving the Holy Ghost/speaking in tongues.
Keep going.. I know it's long, but it's important!
Lets talk about Baptism!...
The scripture say to baptize in Jesus name.
His name is Jesus not the Father, Son and, The Holy Ghost. Those are titles
The name of the Father, Jesus. The name of the son, Jesus. The name of the Holy Ghost, Jesus.
Also sprinkling is not being baptized. One day some regular Joe decided that was ok. Real baptism is to be fully submerged under the water and in Jesus name.
Let's talk about confession/praying...
One there's not one place in the Bible that says to pray to Mary. She didn't die for your sins so why would you pray to her?
Two you no longer have to go to a Pastor, preacher, priest to talk to God.
If you know much about scripture at all the veil was in place and only the priest could go behind it. Once Jesus dies the veil was ripped giving us access to God without a priest.
Let's talk about Oneness just a bit...
Sorry I know some of this is going to be jumping from thing to thing and maybe out of order. This was supposed to be this simple post about you can't just believe in God to be saved, but the more scriptures I used for proof the more things I realized needed to be explained as well. And there's WAY more to explain, but this, this is the start.
This was a long post, but a necessary post.
If you didn't know it now you do, if you still need more proof read your Bible, and if you have questions feel free to ask!