Okay. This shows you don't know what you're talking about. Lutherans don't believe in "eternal security"--they believe you can commit spiritual suicide and lose your salvation (see Hebrews 6:1-4). How can something Luther-- and Lutherans to this day--deny ("once saved, always saved") be the groundwork for "morphing?"
It can't. You're wrong. 'Fess up.
Luther taught his personal doctrine of "predestination", (or election), which is similar to eternal security - the "once saved always saved" concept. I don't know a thing about the doctrine of "spiritual suicide", except that I believe Luther surely committed it when he left the Truth to follow his personal beliefs and founded his own church.