Our terminal decline into old age and death stems from the fine print of the contract that we signed with our mitochondria two billion years ago.

Nothing is more conservative than a bacterium.

Your guardian angel never, ever stops communicating with you. I feel that at times they should be frustrated with us but they seem to have endless patience and they never ever give up on us.

You think with your body, not with your brain.

It's never over till it's really over in your mind...

I have a lot of faith and confidence in Cuban democracy.

I don't think I've had a more miserable life than a lot of people. I think I've had a pretty lucky life.

You know, I try not to look back, because looking forward is so much better than looking backward.

A thing well said will be wit in all languages.

When you know better you do better.

The histories of our two peoples, Palestinian and South African, correspond in such painful and poignant ways, that I intensely feel myself being at home amongst compatriots

Works make not the heart good, but a good heart makes the works good.