最好的想法来自挫折。最糟糕的是当一切都完美的时候。
The mind is a dynamic system of adjustments.
The important thing is not to stop questioning. Curiosity has its own reason for existing.
The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life.