The laws that forbid the carrying of arms are laws of such a nature. They disarm only those who are neither inclined nor determined to commit crimes.... Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man.

The quality of an organization's principles determines the quality of its actions.

Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.

The most successful states in the 21st century will be those that can combine the efficiency of markets with the fairness of democratic institutions.

真正的学者不在于知道多少，而在于热爱真理。