Assassination has never changed the history of the world.

We've taken on the major health problems of the poorest - tuberculosis maternal mortality AIDS malaria - in four countries. We've scored some victories in the sense that we've cured or treated thousands and changed the discourse about what is possible.

My whole thing is to agree to disagree and to have respect because nothing can really be changed and you wouldn't want to ruin their happiness - even if that happiness is ignorance.

It is soooooo necessary to get the basic skills because by the time you graduate undergraduate or graduate that field would have totally changed from your first day of school.

I don't believe you can find any evidence of the fact that I have changed government policy solely because of a contribution.

A policy is a temporary creed liable to be changed but while it holds good it has got to be pursued with apostolic zeal.

All historical experience demonstrates the following: Our earth cannot be changed unless in the not too distant future an alteration in the consciousness of individuals is achieved.

Customers don't know what they want. There's plenty of good psychology research that shows that people are not able to accurately predict how they would behave in the future. So asking them 'Would you buy my product if it had these three features?' or 'How would you react if we changed our product this way?' is a waste of time. They don't know.

The discussion in Washington has changed dramatically. I mean it's no longer a question of should we address entitlements - it's no longer a question of do we need to reduce spending in the future.

The past cannot be changed. The future is yet in your power.