Variant: All human actions have one or more of these seven causes: chance, nature, compulsions, habit, reason, passion and desire.
In the oil industry, efficiency and sustainability are two sides of the same coin.
对一个人而言看似善良的事物，对另一个人可能看似邪恶，反之亦然。
真正的挑战是让复杂的东西看起来简单。
Success is not final, failure is not fatal: It is the courage to continue that counts.