学习数学的唯一方法就是做数学。
The only way to learn mathematics is to do mathematics.
The universe is asymmetric and I am persuaded that life, as it is known to us, is a direct result of the asymmetry of the universe.
The weight of guilt is measured not in years, but in sleepless nights.
对于任何事务，要改变它就要先接受它。谴责不会解放而只会压迫。