"Hearing God's voice" is a major emphasis in revelational faith. These people believe that God is really alive and speaks to the "chosen". Others believe that God's revelation is totally revealed in the written text of "Scripture". These believe that "God speaks" to "His chosen" through "His Word".
Recently, a radio program that "preaches" the latter, has become of concern to my husband. He has listened to this program on and off for years. But, lately, this "Bible-believing" Christian has become convinced that he knows the date of Christ's return, May 21st, 2011!
Why has this become of concern? First, this person's ministry was the "dot and tittle" of the written "Word", but has now become a "rhema Word". What changed this person and how did he become so convinced that he would suggest that those who don't adhere to the May 21st date are not "saved"?!? Has this person become deluded? demented? What caused the change and how does he "know" what he "knows"?
This is why revelational religious claims are not dependable ways of "doing business" in the "real world", where rationality is needed, so that "contracts" can be negotiated and the terms met. Contracts, whether social, or business are based on laws that define the terms and conditions of such relationships. This is why personal words, such as "love" is not the way to term such "real world" problems.
"Hearing voices" is how spiritual leaders many times lead those that have belief in such ways of 'knowing". These do not accept the naturalistic way of understanding such voices, and this is dangerous, as it leads to emphatic demands and fearful reactions about "God's will", which limits others in their understandings. And it damages diversity, and creates religious wars.