He Comforts us so we can comfort others!
"Who comforteth us in all our tribulation, that we may be able to comfort them which are in any trouble, by the comfort wherewith we ourselves are comforted of God." (2 Cor. 1:3-5 KJV)
When God gives us His generous comfort, as sometimes is needed, He gives it to us in such measure that we are able to not only be comforted ourselves, but there is plenty comfort left over for us to give the same kind of comfort to others.
A lesson from mom's sourdough
When I was a teenager I lived in Alaska with my parents in a log cabin. We really "roughed it" in many ways. Mom made a special homemade bread out of sourdough. The sourdough was made from a small batch of sourdough "starter" that she kept in a bag of flour as a small lump. Mom had originally gotten her "starter" from another Alaskan who had kept theirs for years. Each time mom made a batch of bread, she would take a small lump of the sourdough from it and put it into a sack of flour to use the next time. She continued to use that technique year after year, and often gavesome of it to friends when they came to visit so they could make sourdough bread, too.
In exactly the same way, the "comfort that God" gives, is like the sourdough starter and can be used over and over and be shared countless times for others as needed!
"God comforteth us so we can comfort others with the same comfort...."
And, it will never run out!