Here is a guitar TAB for the hymn Amazing Grace. Joe arranged this so the melody stays on the third string most of the time. Because of this, you’ll see an unusual way to voice the G chord. Keeping your 3rd finger on the third string for melody notes and for this particular G chord helps to preserve the singing quality of the arrangement. Don’t play it too fast, though: This is a slow introspective reading of Newton’s famous hymn.