It is far more difficult to murder a phantom than a reality.

革命的想法是青少年的幻想。

The greatest enemy of a trader is hope.

I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.

The only person who cannot be helped is that person who blames others.

Innovation in mining is not an option; it's a necessity for survival.