Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

When you open your heart to positivity, you open your mind to possibilities.

I sent my Soul through the Invisible, Some letter of that After-life to spell: And by and by my Soul return'd to me, And answer'd "I Myself am Heav'n and Hell."

大国政治的悲剧在于它导致冲突和战争。