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I am not afraid of death, I just don't want to be there when it happens.
Laughter and tears are both responses to frustration and exhaustion. I myself prefer to laugh, since there is less cleaning up to do afterward.
Psychology must be a practical science, concerned with the how and why of mental operations.
You have to be ready to suffer and enjoy suffering.
数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。