A man with a watch knows what time it is. A man with two watches is never sure.
This is an aphorism from Aphorisms Galore!'s official collection. It was the Aphorism of the Day for 2014-10-20.
(no title) · posted 2001 by Michael Leibensperger
This quote appeared in a technical paper by Walter F. Tichy (author of RCS), attributed as an "Old Polish Proverb." I came across this paper sometime around 1980 in the Carnegie-Mellon University science library; the quote stuck with me. The paper dealt with clock synchronization in computer networks.
Now you know....