Voice Recognition: How Can You Have the Assurance of Direction in Ministry?

We have all answered our phone and recognised the voice of the person on the other end. That kind of voice recognition is usually the result of frequent phone contact. When have you sought God for direction in ministry and not recognised His voice in response? One of the blessings that God offers every believer is the opportunity to walk and talk with Him. What helps Christians in ministry to have a Holy Spirit-led confidence in order to move forward with clarity of vision?