Every syllable stems from a seed.
Every word that emerges from your mouth can be linked to some convoluted fissure in your brain, whether you realize it or not. Actions, memories, lessons, realizations – they are all tossed into these troughs to bury their roots and begin sprouting. Sometimes you can mask this hidden garden during conversation, but eventually, if someone listens long enough they will begin to see short, fleeting glances into the origin of your words.
It is impossible to misspeak, when you really think about it. Those words simply poured out of your mouth, directly from the seeds they were born from, and you did not react quickly enough to brush them away.