John's short letters show a single concern

 

The apostle John wrote the letters of 1-3 John probably within the same general situation, or occasion, and shows a central concern in all
three, that of preaching, and supporting, the truth and not false doctrine.

Three imperatives (command verbs) in each of the letters seem to capture the emphasis of each one. See those HERE.

Together, the letters emphasize the need, still acute today, for discernment between truth and error and how we should support the (preaching of the) truth and how we should refuse to support error.

How Many Read My Lines I'll Never Know

 
HOW MANY READ MY LINES
 by J. Randal Matheny
 
How many read my lines I'll never know,
Or if they quickly scan or read them slow, 
For few, so few, will ever leave a note
 To say they stopped for truths that I promote; 

Nor can I say if they were touched within, 
Where only God's invisible Spirit has been; 
As fingers click to advance the restless soul
And opinions quick to vote from poll to poll.

Although my frequent posts have paltry views,
'Tis mine this task to write and tell Good News;
As few below there be who're moved or stirred,
There's One above who reads my every word.
 
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