The problem of being in the 'now'

The  valorisation,  to give or assign a value to, especially a higher value. to the state of being in the 'now' would require the person to have at that moment an undivided subjectivity, as well as the primacy that such a position accords to the ‘now’, or to some other kind of temporal immediacy. 

If there was such a 'now' moment it would by necessity exhaust itself in the 'now' momentso the 'now' cannot  be experienced, for there would be nothing to juxtapose itself against in order to illuminate that very ‘now’. 

Instead, Derrida, in his beautifully mathematical way wants to reveal that every so-called ‘present’, or ‘now’ point, is always already compromised by a trace, or a residue of a previous experience, that precludes us ever being in a self-contained ‘now’ moment