We consume our tomorrows ...

We consume our tomorrows fretting about our yesterdays.
 Aulus Persius Flaccus

Quotes from the same author

Lives there the man with soul so dead as to disown the wish to merit the people's applause, and having uttered words worthy to be kept in cedar oil to latest times, to leave behind him rhymes that dread neither herrings nor frankincense.
 Aulus Persius Flaccus
Is any man free except the one who can pass his life as he pleases?
 Aulus Persius Flaccus