Everything about you is designed to hear and recognize the voice of the Lord. The natural man cannot hear God, only your spirit man can. It is the spirit man that receives the things of the Spirit of God. When you were born again, God gave you the ability to hear His voice, its in your very nature. The distinguishing mark of the new testament church is hearing His voice. Only His voice can pierce the heart. We worship, minister to Him, and read the Word until the Presence comes.
