Probably the happiest period in life most frequently is in middle age, when the eager passions of youth are cooled, and the infirmities of age not yet begun; as we see that the shadows, which are at morning and evening so large, almost entirely disappear at midday.

Staid middle age loves the hurricane passions of opera.

Our fMRI scanning reveals that middle age represents the transition between the patterns observed in youth to that found in old age. The seesaw imbalance in the two frontal lobe areas is not as significant as in older adults, but the functional changes are detectable by middle age.

Middle age went by while I was mourning for my lost youth.

The three ages of man: youth, middle age and 'my word you do look well'.

There are three periods in life: youth, middle age and 'how well you look'.