The human voice is the most perfect instrument of all.

I'm not a rapper, I'm a geography legend.

In mathematics, the journey from question to answer is often more enlightening than the answer itself.

——2005年2月24日 斯洛伐克首都布拉迪斯拉发，在与美国总统布什共同举行的记者招待会上就布什批评俄罗斯民主而发言

The true measure of agricultural success is not just yield, but resilience.

Never let your sense of morals prevent you from doing what is right.