We stand now at the turning point between two eras. Behind us is a past to which we can never return... The coming of the rocket brought to an end a million years of isolation... the childhood of our race was over and history as we know it began. Arthur C. Clarke
Honor is like an island, rugged and without a beach; once we have left it, we can never return. Nicolas Boileau-Despréaux
This very second has vanished forever, lost in the anonymous mass of the irrevocable. It will never return. I suffer from this and I do not. Everything is unique - and insignificant. Emil Cioran
We stand now at the turning point between two eras. Behind us is a past to which we can never return... Arthur C. Clarke
It is always sad to leave a place to which one knows one will never return. Such are the melancolies du voyage: perhaps they are one of the most rewarding things about traveling. Gustave Flaubert
There is a limit to the time assigned you, and if you don't use it to free yourself it will be gone and never return. Marcus Aurelius