Age becomes reality when you hear someone refer to that attractive young woman standing next to the woman in the green dress and you find that you're the one in the green dress.

Intelligent life on a planet comes of age when it first works out the reason for its own existence.

The heresy of one age becomes the orthodoxy of the next.

The whole business of marshaling one's energies becomes more and more important as one grows older.

Old age comes on suddenly and not gradually as is thought.

A man growing old becomes a child again.