What is the signifigance and idea of religion in 1984? I have to use quotations from the novel to support this.

You will notice
in that religion, in the sense that we understand it, does not exist.
Priests and prayers, for example, are not a part of the society in Oceania. There are a couple
of reasons for this and they can be understood with the following quote fromin Part Three,
Chapter Three:

"We are the priests of
power."

In other words, the Party has made itself so
powerful that the citizens of Oceania do not need religion. Instead, the Party has created Big
Brother, a God-like figure who demands total submission from his people.

In
addition, for the Party, religion would be problematic...