You're never fully dressed without a smile.

I think Led Zeppelin must have worn some of the most peculiar clothing that men had ever been seen to wear without cracking a smile.

Youth smiles without any reason. It is one of its chiefest charms.

Science is based on the possibility of objectivity on the possibility of different people checking out for themselves the observations made by others. Without that possibility there is no empirical principle capable of deciding between different arguments and theories.

What has become clear from the science is that we cannot burn all of the fossil fuels without creating a very different planet.

As a kid I wanted to write science fiction and I was never without a book. Later I really got into being a scientist and never thought I'd be writing novels.

Without renouncing the support of physics it is possible for the physiology of the senses not only to pursue its own course of development but also to afford to physical science itself powerful assistance.

Nothing matters but the facts. Without them the science of criminal investigation is nothing more than a guessing game.

Science fiction has a way of letting you talk about where we are in the world and letting you be a bit of a pop philosopher without being didactic.

Perfect as the wing of a bird may be it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise.

Pure phenomenology claims to be the science of pure phenomena. This concept of the phenomenon which was developed under various names as early as the eighteenth century without being clarified is what we shall have to deal with first of all.

Chastity is the cement of civilization and progress. Without it there is no stability in society and without it one cannot attain the Science of Life.

Millions of people were inspired by the Apollo Program. I was five years old when I watched Apollo 11 unfold on television and without any doubt it was a big contributor to my passions for science engineering and exploration.

Science has proof without any certainty. Creationists have certainty without any proof.

The conscience of the world is so guilty that it always assumes that people who investigate heresies must be heretics just as if a doctor who studies leprosy must be a leper. Indeed it is only recently that science has been allowed to study anything without reproach.

Facts are the air of scientists. Without them you can never fly.

Science never solves a problem without creating ten more.

You see so many artists who are so talented end up living sad empty lives. This industry takes so much out of you that without the accountability and leaving God in the center you can be left so empty and void.

With out art without communicating we wouldn't live beyond 30 because we'd be so sad and depressed.

So far at least I haven't found a way to tell my kind of stories without making them both sad and funny.

You know what I have noticed? And this is really sad. Flying first class is less scary than flying coach. They speak to you and they're so nice to you and they want to help you and they know you want a drink before the plane takes off. And they bring it to you without asking. If you're sitting in coach and hoping for a drink good luck.

You can't have an up without a down a right without a left a back without a front - or a happy without a sad.

The sad souls of those who lived without blame and without praise.

First accept sadness. Realize that without losing winning isn't so great.