The best innovations are often the simplest solutions to the most persistent problems.
我不是歷史,我是謎。
Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life.
The freedom of thought is the most precious freedom.