It’s not found explicitly in the Gospels, but when Paul spoke to the Ephesians (in Acts 20:35) he mentioned that the Lord Jesus “Himself said, ‘It is more blessed to give than to receive.” That provides another virtue for Defeated Devil December.
We’ve considered that the ancient serpent would rather have us discontent and dishonest. Jesus called Satan the father of lies, so he lies about God’s goodness to man and gets men to lie about their goodness to others. Satan also gets men to lie about their generosity.
Ananias sold some property and claimed that he was Mr. Altruism when he laid the money at the apostles feet. He did everything he could to make it look like he’d given it all; of course he hadn’t. Peter said, “Ananias, why has Satan filled your heart to lie to the Holy Spirit…?” (Acts 5:3). A man convinces himself that it is more blessed to look like he’s given.
There is another angle to this devil-ish conceit. It’s giving, but with brown-paper bitterness tied up with strings. It’s giving, what you see is what you get unlike with Ananias, but what you don’t see is the internal spreadsheet keeping score in columns. Maybe it’s the Lex Talionis Gift List, expecting a gift of equal (or better) in return. Maybe, even more prevalent, is the Honor System Gift List, where the second column is for thank-you cards received (and not received). Such accounting acts as if it’s more blessed to be recognized for giving.
Be generous. Don’t give anything you can’t afford in your soul not to get credit for. Count it all joy to be generous, not counting appreciation. Don’t join Satan as an accuser of the brethren.
 YES. Writing thank you notes is great, appropriate, fitting, right, and something that parents should model and teach their children. The point of this exhortation, though, is about one of the ways we mess up on the giving side, while obviously it’s also possible to mess up on the receiving side.