The Zohar tells that there is a lower world—our world—and there is a higher world.
Our world must continuously receive from that higher world. But how it receives depends upon our state of mind.
If we glow with joy and vitality, then that higher world as well shines upon us in full glory and abundance.
But if we wallow in depression and anxiety, then we can receive only the metered trickle that squeezes through such a constricted channel.
Depression, anxiety and pessimism—these all damage the channels of blessing from Above.
That is why King David said, “Serve G‑d with joy!” Because your joy here draws upon you another joy from above.

Matching Joy. When a Kabbalist speaks about 'joy', it is the illumination from G_d's light that is felt from a response to prayer.
- This prayer is a request for our nature to be corrected.
He corrects our natural mechanism for self-joy. Our natural drive for joy brings fulfillment from the Light but then it rapidly vanishes forcing us to chase after more joy!
In the corrected nature our joy is the ability to pass His Light to others in a joyous system of eternal joy.
Let's request together for the gift of bringing joy to each other, as in His world! Then we can dwell in the same place. His presence, the 'shechina' dwells between us.