Praise & Worship Piano Playing Without Written Music

The Secret of Playing For Praise & Worship Without Written Music (Using Chord Symbols & Words Only) I took a phone call from a very nice lady recently who said I know chords and I know how to read music, but it doesn't do me much good because I play in a church where they don't use any written music -- just a sheet with the words and the chord symbols on it. I don't know what to do. She's not alone..