I am seeing so many quotes misattributed to Shakespeare (and others), it is driving me up the wall!
So here’s an excellent site…
And remember – check for a source: if it’s Shakespeare, you will be able to find out where it is written.
Open Source Shakespeare is an excellent search resource, so use that and other search techniques to make sure you…

Don’t say it’s Shakespeare when it isn’t!
You can find my Pinterest board NOT by William Shakespeare, showing the popular misattributed sayings, here: