Every tree planted today is an investment in a greener tomorrow.
要找到自己,就要为自己思考。
在数学中,提出问题的艺术必须比解决问题更有价值。
“唯一真正无限的是人类的灵魂。”
在科学中,唯一不变的就是变化。
The key to success is to keep growing in all areas of life - mental, emotional, spiritual, as well as physical.
The best way to cheer yourself up is to try to cheer somebody else up.