In order to become a christian today one must follow the example set forth in God's Word on the Day of Pentecost when the church was birthed. The instructions given on the Day of Pentecost point to the fact that the message/promise was given to all those in the future as many as the Lord thy God shall call. (Acts 2:39)You cant put bibleverses which are telling an situation and construct an universell teaching. In no other book then acts you find this. And acts was written to tell the story of the first christians and the church.
No where one single writer of the bible taught this.
I know I got the Holy Spirit, when Jesus came into my life and gave me eternal life.
"All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:" 2 Tim 3:16
Please share scripture that states people receive the Holy Ghost when they believe.