'Ears' in the Bible

"You stubborn people with uncircumcised hearts and ears! You are always opposing the Holy Spirit, just as your ancestors used to do.

It sounds rather strange to our ears, and we would like to know what it means."

For this people's minds have become stupid, and their ears can barely hear, and they have shut their eyes so that they may never see with their eyes, and listen with their ears, and understand with their heart and turn and let me heal them."'