5 Therefore, since we have been justified through faith, we[a] have peace with God through our Lord Jesus Christ, (Romans 5:1 NIV)
When we are justified in doing a thing there is peace around it. Without some level of justification there is no peace.
When we act of our own accord we are often unsure if we are taking the right path. Peace should be a marker of if we are doing the right thing.
Listen to the Spirits guiding through how we feel.