计算复杂性的本质是理解什么可以被有效地计算的极限。
The essence of computational complexity is to understand the limits of what can be computed efficiently.
It is not the strength of the body that counts, but the strength of the spirit.
El silencio es a veces la mejor respuesta.
The act of painting is a way of thinking, a way of understanding the world.
理性不在于正确，而在于信念与行动的一致性。