1 Samuel 3:10
And the LORD came, and stood, and called as at other times, Samuel, Samuel. Then Samuel answered, Speak; for your servant hears.
Although God spoke to Samuel he needed Eli's instruction to enable him to recognise the voice. He heard someone knocking at the door of his heart, but when he looked out all seemed dark until Eli told him in what direction to look for the unseen visitor. We need the direction of those who have become more accustomed to obey such voices, and have thus learned by experience the meaning of such intuitions,
(R. C. Ford, M. A.)
Parallel VersesKJV: And the LORD came, and stood, and called as at other times, Samuel, Samuel. Then Samuel answered, Speak; for thy servant heareth.