They is very old saying "Where-ever Thought goes, the Energy Flows". You are absolutely correct.

What is a Thought?
When we express our thought by speech, it is getting converted into Energy which we can see or hear or feel via our senses.

So it proves that Thought is also an Energy Form how-ever we can see or feel it & bcoz what we cannot see or feel we are not willing to accept it. We also know that Energy can never be lost.

However it can change its state.
What-ever we think ,we actually manifest.
Therefore it is very very important for us to Think Positive at all Times