The boundary between physics and mathematics is not as clear-cut as we might think.

解释：兄弟之间虽然会因谗言而起争执，但在遇到外人的侮辱时仍应一致对外。

The most important thing in science is not to be afraid to ask questions.

孤独は、自分自身と向き合う時間だ。

爱得越多，痛苦越多，但活得也越深刻。