Every portrait that is painted with feeling is a portrait of the artist, not of the sitter.

The last of human freedoms is the ability to choose one's attitude in any given set of circumstances.

Every mathematical theorem is a story waiting to be told, a mystery waiting to be unraveled.

石油和天然气在未来几十年仍将是能源结构的一部分，但我们必须尽可能清洁地生产它们。

我对制作美丽的物品不感兴趣，我对制作有意义的系统感兴趣。

未经审视的生活不值得过。

真実はいつも一つではない。