过去是知识的源泉,未来是希望的源泉。热爱过去意味着对未来的信心。
The most important word in science is not 'Eureka!' but 'That's funny...'
You must be filled with expectancy. You must be awash in hope.
The thought of death should usher us towards whatever happens to matter most to us; it should lend us the courage to pursue the way of life we value in our hearts.