Nothing is so commonplace as to wish to be remarkable.

I’d never heard this one, and just saw it go by on Twitter.  Didn’t sound like Shakespeare.

It’s not, it’s Oliver Wendell Holmes.  Specifically, The Autocrat of the Breakfast Table.

http://www.britannica.com/EBchecked/topic/269504/Oliver-Wendell-Holmes/269504suppinfo/Supplemental-Information

Have a nice day!