I don’t know what time is

I don’t know what time is. I don’t know what its real measure is, presuming it has one. I know that the clock’s measure is false, as it divides time spatially, from the outside. I know that our emotions’ way of measuring is just as false, dividing not time but our sensation of it. The way our dreams measure it is erroneous, for in dreams we only brush against time, now leisurely, now hurriedly, and what we live in them is fast or slow, depending on something in their flowing that I can’t grasp.

— Pessoa, The Book of Disquiet (tr. Zenith)