This one happens to be going around Twitter at the moment. And, as someone on Yahoo! Answers said, “This is quoted 100s of times around the net, but no one ever says where it’s from.” I’ve found similar results in all my searches. Although Shakespeare used the word “meaning” frequently, I can find no combination of meaning along with “hear” and “word” that suggests where this quote might have come from.
I’m still looking for a real source, but like so many other of these Hallmark sentiments, it’s just too simple to ever hope to find evidence for someone who said it first.