True happiness is... to enjoy the present, without anxious dependence upon the future.
~ Lucius Annaeus Seneca
We can't go back and change the past, and we don't know what's coming in the future, yet we find ourselves preoccupied by them and often miss what's happening right now.
Enjoy that conversation, that frienship, that meal, that drink, that book. The past's gone and the future can wait.