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。
失败并不是坏事。它是学习和改进过程的一部分。
The most glorious moments in your life are not the so-called days of success, but rather those days when out of dejection and despair you feel rise in you a challenge to life, and the promise of future accomplishment.
Psychological concepts must prove their worth in action.
The growth of knowledge is the key to solving problems.
The internal point of view is essential to understanding the nature of law.