The life of man in every part has need of harmony and rhythm. - Plato
And yet, when I look up to the sky, I somehow feel that everything will change for the better, that this cruelty too shall end, that peace and tranquility will return once more. - Anne Frank
Tranquil pleasures last the longest; we are not fitted to bear long the burden of great joys. - Henry Ward Beecher
Periods of tranquility are seldom prolific of creative achievement. Mankind has to be stirred up. - Alfred North Whitehead
To compose our character is our duty, not to compose books, and to win, not battles and provinces, but order and tranquility in our conduct. - Michel Eyquem de Montaigne