Lutheran and Reformed differences on Assurance

 This one is "into the weeds" a bit: Dr. Jordan Cooper has a great video on the differences between the Lutheran and Reformed/Calvinist understandings of Assurance.  Assurance was a huge issue - both theologically and practically/spiritually - for John Wesley.  He ultimately grounds assurance both in the reliability of the promises of God and especially the inner experience of the Holy Spirit "witnessing with our own spirit that we are children of God" (as in Romans 8).