Pessimism leads to weakness, optimism to power.

悲观导致脆弱，乐观则通向力量。

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Posters show the dedication to play a generation of bold, inclusive both the strength and power of optimism and enthusiasm lovely vitality.

海报一代展现的是奉献继承的气概气派、包涵兼具的真格的力量、乐不雅向上的动力和热情使人喜爱的活气。

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How do we enhance the belief in ourselves if there's such high correlation and there's a very high correlation and predictive power to a sense of hope, to a sense of optimism, to beliefs.

如何加强我们的信念,如果真有这么紧密的关联,如果希望,乐观主义和信念真的，有着非常紧密的关联和预测力。

哈佛公开课 - 幸福课课程节选

Tempering that optimism were his three reasons, besides the sheer magnitude of the task and a likely tussle for the power to allocate reconstruction funds, why reconstruction will be so difficult.

ECONOMIST: Banyan

Mr Carter has a good feel for the arc America traced from the buoyant post-war optimism of the Apollo programme across the bridge of the Vietnam war to the pessimism surrounding Nixon's fall from power.

ECONOMIST: New fiction

Expectations that Chinese companies will regain some of their pricing power this year, optimism about U.S. demand and the further opening of Chinese capital markets to foreign central banks are among the current drivers for these funds.

FORBES: Where The Money's Flowing