Perhaps some of you will also find the following interesting. I have copied it directly from the World of Belz website which is connected to international Belzer mosdos.
“BRING DOWN THE BLESSINGS
All the blessings we have in life — our health, our spouses, our children, our livelihood — come from above. But how do we bring them down to us? How can we ask for and deserve the abundance that awaits every Jew?
One way is to connect to a tzadik — one of the Great Ones of our tradition. Reb Aharon of Belz was such a one… a Rebbe of such holiness that even after his passing, he continues to look down on each of us and offer this most astounding guarantee: if you connect with him, he will give you his personal support, connecting your wishes with the Source of all blessings in heaven.”
Here you see that the doctrine of the Tzaddik being a “link” between God and the People of Israel.