age, older, attention
Alas, after a certain age every man is responsible for his face.
certain age, responsible, for his face, age
None are so old as those who have outlived enthusiasm.
old as those who have outlived
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
Old age comes on suddenly, and not gradually as is thought.
old age, suddenly, gradually, thought