Romans 12:11

Not lagging in diligence, fervent in spirit, serving the Lord. 

Serving the Lord doesn’t mean we all have to be Pastors preaching from a pulpit. God needs Christian representatives everywhere, and a Pastor isn’t able to be everywhere. We serve the Lord when we walk in love with a person at the grocery store. We serve when we are kind and take an interest in people and help others. God just asks us to remember to do it every day and be fervent in the spirit.