I can not figure out what the word choice I need to substitute.
Each of us will feel a great deal of pride in our heart that we have given our best effort for our community.
I need to subsitute our with something else and I can't figure out what it is.
A common kind of entanglement! The easiest way out of this I see is to change the subject:
"We all will feel a great deal of pride in our hearts..."
[not a teacher]