The secret of change is to focus all of your energy, not on fighting the old, but on building the new.

I don't regret anything I've ever done in my life, any choice that I've made. But I'm consumed with regret for the things I didn't do.

Strategic management is not a science, but an art.

Mathematics is the language in which the universe is written.

The way we frame a problem can greatly influence the solutions we come up with.

战略的本质在于活动——选择以不同的方式执行活动或执行与竞争对手不同的活动。

我不遵守规则，我制定规则。

It seems to me that if you or I must choose between two courses of thought or action, we should remember our dying and try so to live that our death brings no pleasure to the world.