What we know are genera and species, themselves the product of mental action.

Why do we have to say that these thoughts are like mental actions?

If you are well drilled in this, it's second nature and requires no mental action.

No mental action is possible until a child's faculties are ready to be utilized.

I have demonstrated artificial matter, and control by mental action.

She told the truth, for we could determine when she lied, by mental action, of course.

Deciding to do something might be considered a mental action by some.

This could have been a physical, mental or verbal action.

She tried not to cause any ripples with her own mental actions.

This can be a physical, mental or verbal action.