“You know you love someone when you cannot put into words how they make you feel.”

We are at a point in history where a proper attention to space, and especially near space, may be absolutely crucial in bringing the world together.

There is no greater insight into the future than recognizing when we save our children, we save ourselves

Our humanity rests upon a series of learned behaviors, woven together into patterns that are infinitely fragile and never directly inherited.

As the traveler who has once been from home is wiser than he who has never left his own doorstep, so a knowledge of one other culture should sharpen our ability to scrutinize more steadily, to appreciate more lovingly, our own.

It may be necessary temporarily to accept a lesser evil, but one must never label a necessary evil as good.

If man has not found ways to deal with environmental problems such as water and air pollution by 1998, it will be too late. The future is not determined and it lies in our own hands.

My grandmother wanted me to get a good education, so she kept me as far away from schools as possible.

Sooner or later I’m going to die, but I’m not going to retire.

Human nature is almost unbelievably malleable, responding accurately and contrastingly to contrasting cultural conditions.

in all cultures, human beings – in order to be human – must understand the nonhuman.

Even though the ship may go down, the journey goes on.

The negative cautions of science are never popular.

We need every human gift and cannot afford to neglect any gift because of artificial barriers of sex or race or class or national origin.

It is easier to change a man’s religion than to change his diet.

It used to be when we said, ”til death do us part,’ death parted us pretty soon. That’s why marriages used to last forever. Everybody was dead.

Never believe that a few caring people can’t change the world. For, indeed, that’s all who ever have.

Once the object has been constructed, I have a tendency to rediscover in it, transformed and displaced, images, impressions, facts which have deeply moved me (often without my knowing it).

For we can only know that we know nothing, and a little knowledge is a dangerous thing.

The only history that matters is the history we know.

The characteristic of scientific progress is our knowing that we did not know.

Some days I wake up and all I feel are the fractures in the flesh that covers the only me I’ve ever known.

Time, as is well known, sometimes flies like a bird and sometimes crawls like a worm, but human beings are generally particularly happy when they don’t notice whether it’s passing quickly or slowly.

If I get to know somebody, I’ll open up, but other than that I like to sit back and observe things.

I hate and I love. And if you ask me how, I do not know: I only feel it, and I am torn in two.