When One Sings, He Prays Twice... What does St Augustine Really Mean

The quote which St. Augustine actually said was:

"For he that singeth praise, not only praiseth, but only praiseth with gladness: he that singeth praise, not only singeth, but also loveth him of whom he singeth. In praise, there is the speaking forth of one confessing; in singing, the affection of one loving."
(St. Augustine, Commentary on Psalm 73, 1)

Apparently this has been abridged to "He who sings prays twice" over the centuries.

FROM: http://www.saint-mike.org/apologetics/qa/answers/church_history/h020303Parise.html

Also in more detail: http://wdtprs.com/blog/2006/02/20/