Waste not your Hour, nor in the vain pursuit Of This and That endeavour and dispute; Better be jocund with… — Omar Khayyám

Waste not your Hour, nor in the vain pursuit

Of This and That endeavour and dispute;

Better be jocund with the fruitful Grape

Than sadden after none, or bitter, Fruit.

Source: Wikiquote · CC BY-SA 4.0