"God loves a cheerful giver" (2 Corinthians 9:7). The one who does acts of mercy is to do so with cheerfulness (Romans 12:8).
The Greek word in both of these verses is hilarion (hilarious). The human heart cannot find such hilarity - such joy in giving - in itself! Gospel giving that is genuinely generous and genuinely joyous comes from a heart continually made new in Christ Jesus. Such hilarious giving pairs well with our singing of the Offertory in the Divine Service as we anticipate receiving the Lord's Supper - "Create in me a clean heart, O God, and renew a right spirit within me..." The risen Lord who proclaims liberty to the captives is the one who comes to release us from captivity to greed and fear and what may seem like reasonable grumpiness when it comes to giving.
God loves a little hilarity! God also loves you! Christ gives cheerful geneorosity because He Himself is cheerfully generous with all the treasures of heaven!