Gratitude is being grateful, being thankful. Being ready to show appreciation for kindness.
For what shall we be thankful as we grow older, and wiser? We should be thankful for being able to grow older and wiser.
Wiser because we know that climbing to the top of the highest dive board and taking off for the blue depths, might not be the best thing to do for the very first time when your body has some age on it. It will not repair as quickly as it did in your teens, and truly, if you haven't done it by now, why start?
Gratitude makes us happy for where we are and for what we have. So, enjoy and be grateful.