Lessons learned

don't underestimate the level of your knowledge
and notice how long it took to acquire it
you're not a spring chicken after all.
and so, don't overestimate the capability of a
young person to do what you do, it ends
in long nights and weekends at your computer.
it take years to cruise to the moons of Jupiter,
it took years to accumulate this wisdom, these
skills, going to the Moon is a piece of cake.