"A happy life must be to a great extent a quiet life, for it is only in an atmosphere of quiet that true joy dare live."

"Freedom of opinion can only exist when the government thinks itself secure."

"Love is something far more than desire for sexual intercourse; it is the principal means of escape from the loneliness which afflicts most men and women throughout the greater part of their lives."

"Freedom comes only to those who no longer ask of life that it shall yield them any of those personal goods that are subject to the mutations of time."

"Climate change is a global issue - from the point of view of the Earth's climate, a molecule of CO2 emitted in Bejing is the same as a molecule emitted in Sydney."

"I like being busy and juggling a lot of things at the same time. I get bored easily, so I need to do a lot."

"Ah, lives of men! When prosperous they glitter - Like a fair picture; when misfortune comes - A wet sponge at one blow has blurred the painting."

"Whether they give or refuse, it delights women just the same to have been asked."