All diseases run into one, old age.
Ralph Waldo Emerson
age
Noble life
When a noble life has prepared old age, it is not decline that it reveals, but the first days of immortality.
Muriel Spark
Young and Old
You are as young as your self-confidence, as old as your fears; as young as your hope, as old as your despair.
Samuel Ullman
Excesses of youth
We pay when old for the excesses of youth.
J. B. Priestley
Middle age
Middle age is the awkward period when Father Time starts catching up with Mother Nature.
Harold Coffin
Start young
Old age is like everything else.
To make a success of it, you’ve got to start young.
Theodore Roosevelt
Aging productivly
No one can avoid aging,
but aging productively is something else.
Katharine Graham
Days and Years
In youth, the days are short and the years are long.
In old age, the years are short and days long.
Pope Paul VI
Outlived enthusiasm
None are so old as those who have outlived enthusiasm.
Henry David Thoreau
Prime of life
Be on the alert to recognize your prime at whatever time of your life it may occur.
Muriel Spark
Pondering Life : Pursuing Success 