The observer listens to nature: the experimenter questions and forces her to reveal herself.

Nurse, it was I who discovered that leeches have red blood.[]On his deathbed when the nurse came to apply leeches

Hence the same instant which killed the animals froze the country where they lived. This event was sudden, instantaneous, without any gradual development.

Secondly, the nature of the revolutions which have altered the surface of the earth must have had a more decisive effect on the terrestrial quadrupeds than on the marine animals.

My object will be, first, to show by what connections the history of the fossil bones of land animals is linked to the theory of the earth and why they have a particular importance in this respect.

Thus it cannot be denied that the masses which today form our highest mountains were originally in a liquid state; for a long time they were covered by waters which did not sustain any life.

It is evident that one cannot say anything demonstrable about the problem before having resolved these preliminary questions, and yet we hardly possess the necessary information to solve some of them

[Audubon's works are] the most splendid monuments which art has erected in honor of ornithology.

A life lived in fear is a life half lived.

We are still living with the ideology of compromise, not with the ideology of recognition

To know how to free oneself is nothing; the arduous thing is to know what to do with one's freedom.

The key to writing successful YA is to keep the adults out of the story as much as possible.

No one should have to get a PhD in economics to survive in this economy.

What matters most in politics is personality. It's not issues; it's not image. It's who you are and what you represent.

I do what I love to do, what I choose to do.

I've become much more spiritual and use a lot of energy to try and keep the balance.

What I hear from people out there is they always say that [Donald Trump] doesn't like us. And so they're energized.

When a society doesn't know what to do with its young, it's in real trouble. When the young don't know what to do with society - at the very least, revolutions start there.