Hope springs eternal in the human breast

Possible interpretation: The normal interpretation of this saying is that people will always be optimistic and think that something better is coming.

Note: From An Essay on Man by Alexander Pope (1688-1744). Pope seems to be referring specifically to people's belief in a life after death:

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