hidden past and hidden future

Time is like the ancient Ouroboros. Time is fleeting moments, grains of sand passing through an hourglass. Time is the moments and events we so readily try to measure. But the ancient Ouroboros reminds us that in every moment, in every instant, in every event, is hidden the past, the present, and the future. Eternity is hidden in every moment. Every departure is at once a return, every farewell is a greeting, every return is a parting. Everything is simultaneously a beginning and an end.
—  Andrzej Sapkowski, The Lady of the Lake