Mathematics teaches us to think logically and creatively at the same time.

"Friendship isn't about who you've known the longest. It's about who walked into your life and said, 'I'm here for you,' and proved it."

Hope is a scarce resource in poor communities.

最强大的两个战士是耐心和时间。

We must accept finite disappointment, but we must never lose infinite hope.

从近处看，生活是悲剧；从远处看，生活是喜剧。