Can you solve this rebus puzzle?

Do you know what this image is depicting? The answer is a 3-word phrase.
Think you know the answer?
To see the answer to this word puzzle, click to expand the accordion below.
Mind over matter!
A representation of the word “Mind” is over the word “Matter”, ie. Mind over matter.
Need a hint?
If you need a hint, click to expand the accordion below.
What is another word for the image above the word matter?