Imagine that it is now 1st January of a year 2170 AD / AE200.
A digital copy of Your "self" has just discovered a forgotten envelope from year 2018 AD in which Your organic self listed ideas, images, dreams, hopes, insights etc. which had been important for You in days of Your distant youth.
Id est, ideas, images, dreams, hopes, insights etc. which Your future self, overloaded by almost two centuries of History, should never forget.
It is a sort of a time capsule, a sort of a "message in the bottle".
Your task in next 15 minutes is to briefly think about that list and write that letter.