Yep, there are 3 voices.
1. God voice, spiritual thing.
2. Devil, let enjoy sex movie
3. Us, decide wich voice we have to follow.
There are carnal benefits to following spiritual principles. God's voice can (and should be) very practical, as He leads us. Consider how vocal and involved the Holy Spirit was in the lives of believers (including the apostles), telling them where to go and not go. The Lord's voice is known, it is recognized, it is confirmed if necessary. Yes, a spiritual thing, but not limited only to this. I am not saying He will lead you into temptation ("do not say, "I am tempted of God"), but His voice goes beyond the spiritual and into the physical.
I get what you're saying, but Luigi's comment puts God in a box of his own imagination. In fact limiting God. God can lead us to victory in all areas of life, for He knows all things.