I'm not perfect, I don't claim to be, and I don't expect anyone to be.
Life would be infinitely happier if we could only be born at the age of eighty and gradually approach eighteen.   
Mathematics is the language of the universe, and through it, we can unlock the secrets of existence.
生命中最伟大的荣耀不在于从未跌倒,而在于每次跌倒后都能站起来。