When you walk into a room, if everything looks pretty normal you would go over to a chair and sit down. You are expressing confidence in that chair's ability to support you.
Now say for example you were an alien, you would walk in, look around and be skeptical because you are not familiar with the chair. Over time, you develop faith in that chair because it has never failed you and you will have faith in the chair's ability to support you.
So if confidence is the key to our faith and we don't spend any time in the Word, how can we develop our faith? Spend time in the Word so that you can develop your confidence in God's ability to support you and inability to fail you!
Confidence then moves to Boldness