Random Riddle: 5-8-2015

What can be deeper than the sea,
More intriguing than stars and space,
Simple as can be,
Duller than an empty place,
As innocent as a gentle word,
And guilty like a mean jailbird,
From whence comes most of the things we see,
Which otherwise just wouldn’t be.
What can it be, what can it be?
 
Riddle