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When Heaven is about to confer a great office on a man, it first exercises his mind with suffering, and his sinews and bones with toil ; it exposes his body to hunger, and subjects him to extreme poverty ; it confounds his undertakings. By all these methods it stimulates his mind, hardens his nature, and supplies his incompetencies.

Confucius, Mencius, Ming Zuoqiu, Tso-ch'iu Ming (1861). “The Chinese Classics”, p.323
When Heaven is about to confer a great office on a man, it first exercises his mind with suffering, and his sinews and bones with toil ; it exposes his body to hunger, and subjects him to extreme poverty ; it confounds