Three Quotes About Simplicity

I'm reading, as I have been for months now (just going super slow), Ron Sider's Rich Christians in an Age of Hunger. I began a new chapter this morning which began with the following three quotes:
"Before God and a billion hungry neighbors, we must rethink our values regarding our present standard of living and promote more just acquisition and distribution of the world's resources." -The Chicago Declaration of Evangelical Social Concern, 1973

"Those of us who live in affluent circumstances accept our duty to develop a simple life style in order to contribute more generously to both relief and evangelism." -Lausanne Covenant

"The rich must live more simply that the poor may simply live." -Dr. Charles Birch, 1974

These are simply great and simply challenging quotes.