Here are some quotes related to Peace of Mind along with their authors:

“For every minute you remain angry, you give up sixty seconds of peace of mind.” – Ralph Waldo Emerson
“Success is peace of mind which is a direct result of self-satisfaction in knowing you did your best to become the best you are capable of becoming.” – John Wooden
“Watch your manner of speech if you wish to develop a peaceful state of mind. Start each day by affirming peaceful, contented and happy attitudes and your days will tend to be pleasant and successful.” – Norman Vincent Peale
“For peace of mind, we need to resign as general manager of the universe.” – Larry Eisenberg
“If you cannot find peace within yourself, you will never find it anywhere else.” – Marvin Gaye
“If you want peace, stop fighting. If you want peace of mind, stop fighting with your thoughts.” – Peter McWilliams
“Expectations destroy our peace of mind. They are future disappointments, planned out in advance.” – Elizabeth George
“Peace of mind produces right values, right values produce right thoughts. Right thoughts produce right actions.” – Mark Richardson
“You are the strongest when relaxed and at peace.” – Mario Teguh
“A happy life consists in tranquility of mind.” – Marcus Tullius Cicero
“It is not the world that needs peace, it is people. When people in the world are at peace within, the world will be at peace.” – Prem Rawat
“Peace comes not from the absence of trouble, but from the presence of God.” – Alexander MacLaren
“When you’ve seen beyond yourself, then you may find, peace of mind is waiting there.” – George Harrison
“Peace of mind comes when your life is in harmony with true principles and values and in no other way.” – Stephen Covey1
“Nothing can disturb your peace of mind unless you allow it to.” – Roy T. Bennett
“Pleasure is always derived from something outside you, whereas joy arises from within.” – Eckhart Tolle
“Peace of mind comes from not wanting to change others.” – Gerald Jampolsky
“The greatest weapon against stress is our ability to choose one thought over another.” – William James
“Calm mind brings inner strength and self-confidence, so that’s very important for good health.” – Dalai Lama
“Peace is the result of retraining your mind to process life as it is, rather than as you think it should be.” – Wayne Dyer
“Inner peace is the key: if you have inner peace, the external problems do not affect your deep sense of peace and tranquility.” – Dalai Lama
“Happiness is not something ready made. It comes from your own actions.” – Dalai Lama
“Learn to be calm and you will always be happy.” – Paramahansa Yogananda
“When you find peace within yourself, you become the kind of person who can live at peace with others.” – Peace Pilgrim3
“Do not let the behavior of others destroy your inner peace.” – Dalai Lama
“Peace of mind is not the absence of conflict from life, but the ability to cope with it.” – Unknown
“Peace is not something you wish for; it’s something you make, something you do, something you are, and something you give away.” – John Lennon
“The more tranquil a man becomes, the greater is his success, his influence, his power for good.” – James Allen3
“In the midst of movement and chaos, keep stillness inside of you.” – Deepak Chopra
“When we are unable to find tranquility within ourselves, it is useless to seek it elsewhere.” – François de La Rochefoucauld
“Inner peace begins the moment you choose not to allow another person or event to control your emotions.” – Pema Chödrön
“The greatest self is a peaceful smile, that always sees the world smiling back.” – Bryant H. McGill
“Peace is a journey of a thousand miles and it must be taken one step at a time.” – Lyndon B. Johnson
“Peace comes from within. Do not seek it without.” – Buddha
“If you want to conquer the anxiety of life, live in the moment, live in the breath.” – Amit Ray
“The mind is like water. When it’s turbulent, it’s difficult to see. When it’s calm, everything becomes clear.” – Prasad Mahes
“You find peace not by rearranging the circumstances of your life, but by realizing who you are at the deepest level.” – Eckhart Tolle3
“Peace is the result of patience; patience is the result of wisdom.” – Unknown
“Rule your mind or it will rule you.” – Buddha
“Peace is liberty in tranquility.” – Marcus Tullius Cicero
“Anger is the ultimate destroyer of your peace of mind.” – Dalai Lama
“Those who are free from resentful thoughts surely find peace.” – Buddha
“If you want peace of mind, start controlling what you allow in it.” – Unknown
“The life of inner peace, being harmonious and without stress, is the easiest type of existence.” – Norman Vincent Peale
“If you are depressed, you are living in the past. If you are anxious, you are living in the future. If you are at peace, you are living in the present.” – Lao Tzu
“Sometimes, you can find peace of mind by transferring yourself to different situations. They’re just reminders to stay calm.” – Yves Behar
“Don’t search for anything except peace. Try to calm the mind. Everything else will come on its own.” – Baba Hari Das
“The best you can do for anyone is to thrive fully and be willing to explain to anyone who asks how it is that you are thriving, and what it is that you’ve discovered – and then, just relax and trust that all truly is well.” – Esther Hicks
“Only the just man enjoys peace of mind.” – Epicurus
“The mind is never right but when it is at peace within itself.” – Seneca the Younger