I think most people experience and recognize the workings of the Holy Ghost to some extent. Many people talk about having a 6th-sense, or feeling inspired or directed to live a certain way, to do certain things, or work in a particular profession. Many Christians may even feel that God has called them into a particular ministry or service. I think the Bible teaches how imperative it is for all of us to tap into this spiritual communication on a daily and even constant basis. However, with our noisy lives, it sometimes can be difficult to discern the feelings and promptings of the Holy Ghost. The Old Testament describes the voice of the Lord as a still small voice:
John 15: 26 But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me.