If you believe that the world is divided into good guys and bad guys, then
you are definitely need to refine your brain.
you are definitely require to refine your brain.
you are definitely required to refine your brain.
Could someone explain me which sentence is correct?
I think "you are definitely required(needed)..." sounds a different meaning because it is likely the second person is required(needed) by the speaker to refine the former's own brain, something similar to "You are hired!" or "You are needed!".
I have found over a million of usages in google with "you are definitely need to" but I am not sure if I can use "you are definitely require to" in that case.