Some people think that being carnal means one is evil. But carnal only means fleshly. Yes, there are some carnal things that are bad. But there are some good carnal things. Marriage, cars, money, jobs, friends are all carnal things.
Carnal things are fine if they are in their proper priority.
But when it comes to the Word of God and hearing God speak to us, we need to get our hearts involved and open our spirits up to God. We do not need our hearts in our jobs. We do not use our spirits when we are figuring out what we need for groceries this week, or what bills are due this week. And we can get by in everything in the world without using a our spirits and the part of us that is spiritual. There is a part of us all that is spiritual.