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To every action there is always opposed an equal reaction； or， the mutual actions of two bodies upon each other are always equal， and directed to contrary parts.

解讀：不勞而獲、投機取巧所得快樂轉(zhuǎn)瞬即逝，唯有持續(xù)付出汗水與心血，攻克難題、實現(xiàn)目標，由此產(chǎn)生的快樂才扎實、長久，激勵踏實奮斗。

A leader's legacy is measured by the sustainability of their actions.

The opinions of the wise are alike, but fools have their own way.