DO by being UNDONE Matthew 16:25
Our ACTIONS aren't in the front of the train. They aren't the "engine"
Our ACTIONS are in the back of the train. They are the Caboose. They follow everything.
What I VALUE...Determines and sets in motion...my DECISIONS...which determines my ACTIONS and my DOING...Which then at the end, God determines whether I made the right choice and the right action and I get rewards or not.
He gives us the WRONG answer first: SAVE my life. Keep it. Hold it.
Then He give us the RIGHT answer: L-O-S-E my life. This is a metaphor for BELIEF, following Him, denying oneself for Him, having FAITH, and the startling: Take up your CROSS.
So, if you life is a mess, here you get THE answer about how to fix it. If you valued your life truly, you'd LOSE it (to Him), You'd give it (to Him). God's crazy math: GAIN your life by LOSING it (to Him). The "do" that He is asking is primarily to be "undone". Listen, and DO by being UNDONE.