真正的历史学家是真理的战士。
The true historian is a soldier of truth.
教育的目的不是使年轻人在任何一门科学上都变得完美,而是要打开和培养他们的思维,使他们在将来学习任何科学时都能胜任。
The art of progress is to preserve order amid change and to preserve change amid order.
Innovation in science often comes from looking at old problems in new ways.