The more that we are able to mature in our relationship with God, the better able we are to hear his messages and discern his voice. The mature hear God clearly as He speaks to them through the power of the Holy Spirit. But, the immature and those who are new to the Faith hear conflicting messages from God, the world, self-centered feelings, and Satan.
In His wisdom, God has provided voices to those who are struggling to hear God clearly. He speaks through prophets, pastors, teachers, and those gifted with words of wisdom & knowledge to help Christians to reach a level of maturity so that they can hear God much more clearly.
Unfortunately, there are so many false prophets, pastors, and teachers that it might seem nearly impossible to figure out which is of God and which are not. But, Scripture provides guidance to help Christians understand which voices are from God.