The study of mathematics is the indispensable basis for all intellectual and spiritual progress.
数学的研究是所有智力和精神进步不可或缺的基础。
心理学必须是一门功能的科学,而不仅仅是事实的科学。
Humanity's greatest enemy is itself.
The only limit to our realization of tomorrow will be our doubts of today.
不要等待完美的时刻。抓住这一刻,让它变得完美。