现在你们不是国人的勇士,怎么能既学好学业又学好射箭呢? 
Precision in experimentation is as important as creativity in hypothesis.
The mother-child relationship is paradoxical and, in a sense, tragic. It requires the most intense love on the mother's side, yet this very love must help the child grow away from the mother, and to become fully independent.
The rise of China and other authoritarian states challenges the idea that liberal democracy is the only viable political system.