Is it better to do the right thing or have the right motives?

St Augustine said ""dilige et quod vis fac." translated as "Love and then what you will, do." a href="http://en.wikiquote.org/wiki/Augustine_of_Hippo" rel="nofollow"http://en.wikiquote.org/wiki/Augustine_o…/a And in other places as "Love God and do what you will."