The most difficult thing in life is to know yourself.

如果你下定决心，你可以完成任何事情。

The rise of China and the resurgence of Russia have challenged the idea that liberal democracy is the only viable form of government.

太阳是宇宙的灵魂，地球是它的躯体。

Every decision we make today shapes the world we live in tomorrow.

解释：才华有高下之分，没有古今之别；文章有真实、虚伪之差，没有新旧之异。