Do you ever question the voice you hear inside your head? Where is it coming from?
Is it from God, evil, your physical urges or your psyche? One way of discerning these differences is through repetition with the bible as your personal reference manual. The bible is here to help us discern many things while we are here on earth. Familiarity with the word of God is more than memorization, it is spending time with God and learning to hear His voice which then will permeate through our being and clarify voices within us.