Grey-headness, they say,"Is the beauty of the old"! A young boy today becomes a young man tomorrow and tomorrow an old man- thats the chain of human growth...
"The young shall grow", so was your grandma told in her youthful age, now she has grown old, grandma should be between 75 & 80 years of age (she can no longer do virtually all she does when she was much younger, to add fuel to fire, she got her hip broken! geeeezzz... Please do visit her more, she needs you more.
Now, we too have been told the same words grandma was told then-" the young shall grow", though we're growing not old yet (lol), still agile, strong and filled with vigour- "we want to make the best of things" (I quote you) before the time comes and we now say(in line with the thoughts of wise King Solomon):

..... I have no pleasure in them.