It was a heart problem - plain and simple! Mean, green Mr. Grinch hated the Whos, their singing, their sparkly trees, their Christmas feast, their fun and what he hated, hated the most was their joy! Quite mistakenly Mr. Grinch thought the Whos joy in Whoville came from the trappings of Christmas. So he hatched a diabolical plan to steal Christmas from Whoville and put to death forever all the joy in Whoville.
He rides into Whoville in the dark of night and absconds with every present, decoration and morsel of the Christmas feast he can choke down his mean, green throat or carry away in his buldging bag. Then he stands high above Whoville just watching and waiting for the cries of "BOO-HOO"!
"He stared down at Whoville! The Grinch popped his eyes! ... What he saw was a shocking surprise! Every Who down in Whoville, the tall and the small, was singing! Without any presents at all! HE HADN'T STOPPED CHRISTMAS FROM COMING! iT CAME! Somehow or other, it came just the same!"
Mr. Grinch just didn't get the heart part! Mr. Grinch had an epiphany of sorts high on his icy mountain: "How could it be? ... Maybe Christmas doesn't come from a store. Maybe Christmas ... perhaps ... means a little bit more."
Mr. Grinch finally started to understand. Without radical surgery on every Who in Whoville he couldn't steal Christmas as Christmas comes from the heart.
It started long before the world began in the heart of God. It was thousands of years before God dropped the greatest Present of all into our world! God had been watching and waiting for just the right time and then "Kazaam!" Jesus came and Christmas was and IS in the heart of every man, woman, boy or girl who understands that Christmas comes from within the heart no matter whether there is a tree, a gift or a treat when Jesus lives in that heart! That's why Whos in Whoville can sing when it doesn't seem possible - because the joy is heart deep! AND the Whos down in Whoville say, "The Grinch's small heart grew three sizes that day!" (with apologies and thanks to Dr. Seuss!)