Images in the Mind...

Thinking is a tool. 

Yet, it is a lesser tool than the gift of the Imagination.

You can Imagine something.
That is a creative action.

You can think about what you Imagined and that is a re-action.

Thinking is always in response to something. Either from the "outside" world, or often in response to itself.

As a tool, thinking can enhance or be useful to a creative act of Imagination.

Losing control of the thinking tool can be very destructive.
Proceed with caution! Be patiently aware and assert your mastery of the tools of your mind.