Do parents sit down and tell their kids everything? I don't know. I don't know. I've convinced myself - I hope I'm right - that children despair of you if you don't tell them the truth.

The one thing that offends me the most is when I walk by a bank and see ads trying to convince people to take out second mortgages on their home so they can go on vacation. That's approaching evil.

I think it was my study of history that convinced me that the Democratic Party was more on the side of the average American.

You can only get really unpopular decisions through if the electorate is convinced of the value of the environment. That's what natural history programmes should be for.

In speech after speech on his health care plan the President has tried to convince us that what he is proposing will be good for America. But how can it be good for America if it raises taxes by a half trillion dollars and costs a trillion dollars or more to implement?

Science is the international language so when we are able to convince countries that good decision-making for human health and animal health is based upon science that's a real success story for us.

Here in Silicon Valley I have taken part in hundreds of conversations trying to convince people to dive in and become entrepreneurs. All too often innovators with good safe jobs are unwilling to put their family's access to health care at risk by walking away from company-backed medical insurance.

I am deeply convinced that happiness does not exist in this world.

I am more and more convinced that our happiness or our unhappiness depends far more on the way we meet the events of life than on the nature of those events themselves.

We are long before we are convinced that happiness is never to be found and each believes it possessed by others to keep alive the hope of obtaining it for himself.