"Varied are the ideas of what constitutes "success," e.g. money, position, power, achievement, honours, and the like. But these are not open to every man-nor do they bring what is real success, namely, happiness."

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Development of Western science is based on two great achievements: the invention of the formal logical system (in Euclidean geometry) by the Greek philosophers, and the discovery of the possibility to find out causal relationships by systematic experiment (during the Renaissance). In my opinion, one has not to be astonished that the Chinese sages have not made these steps. The astonishing thing is that these discoveries were made at all.

— Albert Einstein