我们必须不断挑战我们的假设，并愿意改变我们的想法。

解释：齐国是强国，利用它的强大进攻宋国，让他逞强，燕国就可以乘机打败齐国；齐国是大国，利用它的大国野心吞并宋国，增加土地，燕国就可以乘机进攻。

I don't let negativity bring me down. I rise above it.

The battle of life is already half won by the young man who is brought personally in contact with high officials; and the great aim of every boy should be to do something beyond the sphere of his duties--something which attracts the attention of those who over him.

我是一个有使命的女人，不达目的绝不停止。