[Thou hast nor youth, nor age;
But, as it were, an after-dinner's sleep,
Dreaming on both]
This is exquisitely imagined. When we are young, we busy
ourselves in forming schemes for succeeding time, and miss the
gratifications that are before us; when we are old, we amuse the
languor of age with the recollection of youthful pleasures or
performances; so that our life, of which no part is filled with
the business of the present time, resembles our dreams after
dinner, when the events of the morning are mingled with the
designs of the evening.