Have you ever thought about how scripture comes about? How was scripture written in the first place? To whom was it given?
16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
17 That the man of God may be perfect, throughly furnished unto all good works.
2 Timothy 3:16,17
Most churches only have the Bible as scripture. Why would God only speak to the people in olden times and not today? I testify that a modern prophet lives today and that God continues to give scripture and guidance today.