Mathematics is a living, breathing discipline, constantly evolving with new ideas.
Children’s books should be full of warmth, not just lessons.
生活是世界上最罕见的事情。大多数人只是存在，仅此而已。
"To love is to risk not being loved in return. To hope is to risk pain. To try is to risk failure, but risk must be taken because the greatest hazard in life is to risk nothing."