"To follow a thought" means to continue thinking about a specific idea or concept, without getting distracted or changing the subject. It refers to the act of concentrating on a particular thought and exploring it further.
Sentences with «to follow a thought»
Really enjoying following your thoughts on your new home. (theinspiredroom.net)
It's a privilege to follow the thoughts of someone who doesn't believe they have all the answers. (redeeminggod.com)
This way I can follow the thought process when I have to make the call. (thechampagneedit.com)