From someone who's been there.
Learning BASIC spoken Japanese isn't that hard.
But learning to speak like a person of your age bracket, instead of a 10 year old girl...
Well, that's a whole different difficulty. ;)
In that final hour, when each breath is a struggle to take, and you are looking back over your life's accomplishments, which memories would you treasure? The empires you built, or the joy you spread to others?
Therin lies the true measure of a man.