the joy of giving
In Parshas Teruma, it says, vayikchu li terumah, or they should take for me terumah. The rabbis say it should have said ten or give, why take? The rabbis tell us that when you give, you are really taking. The proof is in the numbers. The gematria of the above phrase is 821. Another phrase with the same number is simchas hachayim, or the happiness of life. This teaches us that there is a direct relationship between giving and taking in that the effect of giving brings joy and happiness to the giver. It is also the gematria of avodas Hashem, or service of God. It teaches us to serve God with joy, as noted by King David who says, ivdu eis Hashem b'simcha, serve God with joy. https://www.amazon.com/Code-Heart-Gematria-Bible-Decoder/dp/1520393466