Did James Joyce really coin "If you want to know what a man thinks watch what he does"?

Hi
Did James Joyce coin “If you want to know what a man thinks watch what he does”? I couldn’t find it. If not Joyce, who?

I look forward to your feedback.

  1. 28 minutes into to video.

Ex-ambassador: Trump is like a velociraptor
https://www.youtube.com/watch?v=B4LDUenFr3s

I can’t find any attribution for the quote. It is not listed in Brainy Quotes under Joyce, so probably not his.

I have seen it referred to as “an old Irish saying.”