Be nice to people on your way up because you might meet 'em on your way down.

But wild Ambition loves to slide, not stand, And Fortune's ice prefers to Virtue's land.

[I]t occurred to me that the voracious ambition of humans is never sated by dreams coming true, because there is always the thought that everything might be done better and again.

But what will not ambition and revenge Descend to? who aspires must down as low As high he soar'd, obnoxious first and last To basest things.

Such joy ambition finds.

Here may we reign secure, and in my choice To reign is worth ambition, though in Hell. Better to reign in hell than serve in heaven.