"mental peace" is a correct and usable part of a sentence in written English.
You can use "mental peace" when referring to a state of calm or lack of stress and worries. For example: "I need to find ways to achieve mental peace and relaxation so I can better manage my stress levels."
In this way he sought happiness, or at least mental peace.
Mental peace has no price, and I don't have peace here".
But the point of a criminal justice system in a civilised society is not the mental peace of those collaterally wounded by crime.
"Some people understand that we are looking after the most precious things in their lives — their homes, their children, their parents, their mental peace is in our hands," she said.
On an investigative visit to Innsmouth, the young narrator sees the fish-people with his own eyes: "It was the end, for whatever remains to me of life on the surface of this earth, of every vestige of mental peace and confidence in the integrity of Nature and of the human mind," he writes.
There's also a suggestion of scheduling "meetings with self" - actually putting half an hour in the diary where you allow yourself half an hour of mental peace.
Leggings, it is said, have led to a "violation of the mental and physiological peace" of Iran's youth.
The second series picks up not too far from where we left them: having submitted to electroconvulsive therapy, Carrie is focusing on her mental health; finding peace through routine and gardening.
And it infuses every moment of your beautiful life. 5. Less mental noise, more peace.
I think that's something that we all want to look forward to; that our senior years are full of joy, energy, mental clarity and peace and equanimity and comfort in the last few months of life.
In contrast to other items, which describe specific symptoms of anxiety and depression, the "mental problems" and "peace in mind" items are of general nature, and may indicate an underlying construct such as "mental illness".
