What I'm Reading

I'm currently reading How Language Works by David Crystal.
I'm no where near done (I'm a slow reader.) I found this passage on
page 139 related a great deal to my last post:

It is at this point that children most need guidance about the
structures and functions of written language. In particular, they
need to learn that writing aids thinking in ways that speech cannot
perform. Writing is a medium where there is time to reflect, to
re-think, to use language as a way of shaping thought.

If you can tell me how I related this passage to yesterday's
post, you will be my best commenter ever!