challenge Quotes

It is difficult to free fools from the chains they revere.

I want to keep on the move, keep stimulated and challenged.

Politics are very much like war. We may even have to use poison gas at times.

By the time we see that climate change is really bad, your ability to fix it is extremely limited... The carbon gets up there, but the heating effect is delayed. And then the effect of that heat on the species and ecosystem is delayed. That means that even when you turn virtuous, things are actually going to get worse for quite a while.

Philanthropy should be taking much bigger risks that business. If these are easy problems, business and government can come in and solve them.

The problems of victory are more agreeable than those of defeat, but they are no less difficult.

Every time I write something, I think, this is the most offensive thing I will ever write. But no. I always surprise myself.

Man needs his difficulties because they are necessary to enjoy success.

Man needs difficulties; they are necessary for health.

Virtue rejects facility to be her companion. She requires a craggy, rough and thorny way.