God grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference.
— Reinhold Niebuhr

Within you there is a stillness and a sanctuary to which you can retreat at any time and be yourself.
Hermann Hesse serenity quote

The more you lose yourself in something bigger than yourself, the more energy you will have.
— Norman Vincent Peale

The more tranquil a man becomes, the greater is his success, his influence, his power for good. Calmness of mind is one of the beautiful jewels of wisdom.
— James Allen

Peace of mind comes from not wanting to change others.
— serenity quotation by Gerald G. Jampolsky