That some should be rich, shows that others may become rich, and hence is just encouragement to industry and enterprise. Let not him who is houseless pull down the house of another; but let him labor diligently and build one for himself, thus by example assuring that his own shall be safe from violence when built.
- Reply to New York Workingmen's Democratic Republican Association (21 March 1864)
http://en.wikiquote.org/wiki/Abraham_Lincoln
Near the bottom of the page, you'll also find a list of mis-attributed quotes that includes the ones you posted.
aBump!