我不是悲观主义者，我是一个受过悲观主义训练的乐观主义者。
I’m not a pessimist. I’m an optimist trained in pessimism.
Liberty cannot be preserved without a general knowledge among the people.
I don't wait for moods. You accomplish nothing if you do that. Your mind must know it has got to get down to work.
释义：如果只听取某一个人的意见或只依赖某一个人，就容易产生奸邪之事；如果独自决断、只任用某一个人，就容易引发祸乱。
Freedom would be not to choose between black and white but to abjure such prescribed choices.
人的手十分精细和复杂，它不仅使心灵得以展现，还能使人跟整个环境建立一段特殊的关系。