Only after these had passed was God heard, in a still, small voice. You cannot receive Christ and know that He is God unless you are sensitive to His still, small voice. When a pastor preaches in church, he prepares and studies, but he has to trust God for the message. God brings in a message, and the Holy Spirit directs. The leading of the Holy Spirit is so sensitive that it is easily interrupted.
Concentration is required.
Worship is concentrating on the Word of God like it is the last word you will ever hear. May we come away to a quiet place to commune with God and hear His voice. And when he had sent them away, he departed into a mountain to pray. And he said, Go forth, and stand upon the mount before the Lord. And when he had sent them away, he departed into a mountain to pray.