This refers to the actions of people with strong faith.
## people ##
From the context, this most likely refers to other believers (see UDB).
## For the kingdom of God is not about food and drink, but about righteousness, peace, and joy in the Holy Spirit. ##
"For God did not set up his kingdom so that he could rule over what we eat and drink. He set up his kingdom so we could have a right relationship with him and the Holy Spirit could give us peace and joy."