I would have to say that our prayers can be heard by the devil, if we can hear them and someone standing near by can hear them. When we pray the scriptures tell us to pray in a room with the door closed. Matthew 6:6 I would have to believe this is because, if we can build our faith to a point, that we can keep from fear, doubt, or worry, and we pray in secret, and God can reward us openly, we will see that God is answering our prayers of faith. If we allow another to hear what we pray for, their confession of fear, doubt, and worry, can and will effect our faith, because faith comes by hearing and hearing the word of God. And if someone is saying God did not hear you or it didn’t work, etc… your faith will be hindered greatly.
When we pray in tongues we do not know what we are saying, we believe by faith that what we just said God heard and when we get what our desires are, we know that the praying in tongues is working. 1Corinthians 13, 14To have signs following our prayers, is the best faith builder I can think of. Now if we pray in tongues and we cannot understand what we just said, the devil cannot even say, “You will not get what you prayed for.” You do not know what you said yourself. And how sweet that is. The scriptures tell us that when we pray in tongues we pray in a way that we do not know what to pray for. It allows us to pray for someone in the Spirit and the Spirit knows what everyone needs. And how sweet that is. If you can not mess up tongues because you do not know what you are saying I would have to say the devil cannot either.
When we know all about the devil and find out how little power he has, we get to a place in life we are supposed to be as God’s children. The more we find out about the devil the better. If we can identify every wolf dressed up like a sheep, and let others know we can smile from ear to ear as the devil is exposed.
Know this, the devil is a conterfeiter. He can only make a cheap, and twisted imitation of the real thing, and it will cost you, because he comes not but for to steal, kill and destroy. And the devil is a liar and the father of them.John 8:44 Thanks for the discussion.