Every time you try to stabilise the meaning of a thing, it slips away

What is really happening, is always “to come”. 

Every time you try to stabilise the meaning of a thing, try to fix it in its missionary position, the thing itself, if there is anything at all to it, slips away

To put Derrida’s point simplistically, it might be suggested that the meaning of a particular object, or a particular word, is never stable, but always in the process of change (eg. the dissemination of meaning for which deconstruction has become notorious). 

Moreover, the significance of that past change can only be appreciated from the future and, of course, that ‘future’ is itself implicated in a similar process of transformation were it ever to be capable of becoming ‘present’. 

The future that Derrida is referring to is hence not just a future that will become present, but the future that makes all ‘presence’ possible and also impossible. 

Strikes me that the above is philosophy as poetry