Both as a point in time and as category of being. Dogen wrote about this in ‘Uji’, early in his Zen life. He says we should not think of time as only passing. Time is a point or moment, time is also a line (a coming and going) and time is reality itself according to Dogen. In our understanding of time we forget that it is always now and this now contains the whole universe. There is no other now in which something else exists. There is no separate flow in which anything is. My being is in time, therefore a time being.