forty is old age, fifty is youth of old age
Age is not a particularly interesting subject. Anyone can get old. All you have to do is live long enough.
age, interesting, live long enough
Old minds are like old horses you must exercise them if you wish to keep them in working order.
old minds, exercise, working order, age
Aging is not lost youth but a new stage of opportunity and strength.
aging, new stage of opportunity, age
Old age is like everything else. To make a success of it, you've got to start young.