If something's worth doing, its worth doing right - Unknown
Sure, for a certain definition of "something" and "doing right." But people often use an unhelpful definition of "doing right." I have over-invested in many projects. For example, I used to spend hours organizing my music collection.
(Since there didn't seem to be one for this month, and I just ran across a nice quote.)
A monthly thread for posting any interesting rationality-related quotes you've seen recently on the Internet, or had stored in your quotesfile for ages.