Hope springs eternal in the human breast

It is in the nature of man to look forward to better times, despite set-back and disappointments.

The proverb is  a quotation from Pope‘s Essay on Man (1733).

Hope springs eternal in the human breast:
Man never is, but always to be, blest.
The soul, unesay and confin’d from home,
Rests and expatiates in a life to come.

The second line means that man never is blissfully happy, yet always thinks he is about to be. In the fourth line ‘expatiates’ means ‘wanders freely’.

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