There is a difference between hearing what someone is saying and actually listening to them. If we are following our own agenda we will end up with a distorted perception of God and we will be made deaf to His truth. In parts of our hearts there can be areas of prejudice that results in an inability to receive truth from certain vessels. God is prompting us to prepare our hearts to listen to what His Spirit is saying regardless of who is speaking. The voice of Jesus warms our hearts and produces soil that hears the word of God and receives it.