To have reached and thus defined a limit implies that one has already moved beyond this limit.

To identify the limit of the thinkable, one needs to think what cannot be thought.

set theory shows that a completed infinity is no contradiction.

But this thought only applies to thought and logic alone. In thinking about an object/matter I can reach teh limit of thought

But in an object 

 

It is harder to say something that shows itself,

than to try and say something about something that cannot be said (but shown)

In the first instance both -that which shows and that whichg can eb said about it does not come from myself.