Time is the image of eternity.

- Laertius Diogenes

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Time is the most valuable thing a man can spend. Theophrastus (372 BC - 287 BC), from Diogenes Laertius, Lives of Eminent Philosophers
As if you could kill time without injuring eternity. - Henry David Thoreau
Time is too slow for those who wait, too swift for those who fear, too long for those who grieve, too short for those who rejoice, but for those who love, time is eternity. - Henry Van Dyke
Apparent failure may hold in its rough shell the germs of a success that will blossom in time, and bear fruit throughout eternity. - Frances Watkins Harper