Wikitionary describes soundbite as:

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> a short extract from a recorded interview or speech, chosen for its succinctness or concision.
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What would be an equivalent word for a written medium, as opposed to audio?

I've used several phrases over the years to describe these but nothing as succinct as soundbite.

Example usage: 

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> That blog was full of wordbites that expressed the thoughts I had. 
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What this would mean is roughly one of the following 3 or a mix of them:

* That blog was full of phrases which put very clearly the nuanced thoughts I've had on the subject but haven't been able to express very well.
* That blog was full of phrases which read really well and communicate the ideas very clearly, which I also had.
* That blog was full of quotable phrases which I'd rather use instead of explaining my thoughts in my own words