Yesterday is history. Tomorrow is a mystery. And today? Today is a gift. That's why we call it the present.

The saying contrasts three temporal dimensions to argue for mindful presence: the past is fixed (“history”), the future unknowable (“mystery”), but the present is both all we truly possess and something to be valued (“a gift”). The final pun—“present” as both “now” and “a gift”—turns the thought into a memorable maxim, encouraging gratitude and attention to immediate experience rather than regret or anxiety. In quotation culture it often functions as a secular proverb aligned with mindfulness and stoic/Zen-inflected advice literature, emphasizing agency in the current moment even when past and future lie beyond control.