What Does It Mean to Walk by Faith?

What does it mean to walk by faith? We want to know what the Bible says about it. But we also want to see if the Bible describes what the opposite of what walking by faith is. The Bible says that the opposite of walking by faith is walking by sight. Faith is living your life based on invisible realities that your physical senses can't apprehend. The Bible not only defines faith for us, but also gives real examples of men and women (a cloud of witnesses who are beckoning us on) who had to walk by faith and not by sight.