On yesterday's memorial day, Br Matthew of Intentional Disciples looked at the famous command attributed to St Francis: "Preach the Gospel at all times and, if necessary, use words." The first trouble, he points out, is that it's apocryphal. But there's more.
This reminds me of a remark I heard when I was attending a theologically liberal Mennonite church where charitable works were much in vogue. Our guest speaker, visiting from the Midwest, had cooperated with some Baptists on a relief project for a town a tornado had hit. And one of the Baptists had said, our speaker recalled, "You know, you Mennonites are fine people, but you don't preach what you practice."