Steve, you are worrying about nothing, people will criticize you because they are jealous and can't write from their imagination. God still speaks to songwriters to write His messages today. Write what He prompts you to write. I have a song called KEEPING MY EYES ON THE EASTERN HORIZION those words may not be in the bible as such but it says He is coming from the East, so I took it from there. Some people just love to nit pic, they may even be prompted by the enemy to do so to discourage you from writing.