"Think before you speak," is not so much a wise word, It's a practical statement.
To think and articulate our thoughts is very important because it's upsetting to listen to people using a lot of fillers.
What I really think is,
that I think,
it's this way.
Blah Blah Blah.
I am distracted the moment, the speaker uses filler. Wait, how many fillers do I use in my articulation? You know, it's time to observe myself.