The Hachamim (the sages) tell us—in fact, the Arizal says—that the act of giving tzedakah (charity) itself carries within it the name of God. How? The Vav, in the letters Yud-Heh and then Vav-Heh, is the arm of the person reached out. The Yud, in the letters Yud-Heh and then Vav-Heh, is the perutah, is the coin, the small little thing that's being given hand to hand. And the Heh and the Heh represent the two Jewish people standing on either side of this equation. Now, this concept—that the act of giving tzedakah represents the name of God—teaches you. And you know why God says, “Test me when it comes to tzedakah”? Because in that moment, you have eliminated and erased the space between you and the source of all berachot (blessing).
You are God's hand. We say, “You open your hand and you give to all living things.” Where does God open His hand? When we open ours. That is God opening His hand. Through us. God doesn't have a hand. But in the opening of a Jewish person's hand is the hand of God opening in our world. And therefore God says, once you're aligned with me and you're connected with the that's not testing me. You're in alignment with the source of all blessing. Of course, you'll see that Beracha expressed.