We called that the 'story crisis,' and we never expected to have another one. But you know what? There's been one on every film. We don't stop production for five months. We've gotten a little smarter about it. But there always seems to come a moment where it's just not working, and it's so easy to fool yourself - to convince yourself that it is when you know in your heart that it isn't.

This is a French expression, silence radio, which is used in the navy, for example—when you cannot use the radio because the enemy is near. It’s not an expression I use regularly; I used it once, maybe, to describe my period of inner silence, which mostly happens when I’m back home, coming from Houston. The long weeks or months of silence. So it’s the opposite of inspiration; it’s the time of doing other things. Waiting.

I know what you mean, but there are two kinds of voids, the one that you work with and the one that you bear. I work with and try to generate a void. I pick up the guitar and I let my mind wander until it gets distracted and suddenly it lost its purpose. It’s just wondering between one chord and the other, one subject or the other, or maybe I would just be distracted watching a film and something moves me, or the light in the window and then I let that feeling guide me. I always use this metaphor. It’s like getting into a garden at night and suddenly perceiving a perfume of a tree or a flower. You don’t know exactly where it’s coming from, but you know there’s something there, so you start sniffing around until you find it. You get closer and closer to the source until you identify it. That’s the way I write. What I mean is that suddenly something crosses my mind and I just follow that. I try not to lead at the beginning. I try to follow and then whenever I find that I take, I use reason and I organize. I say, “Wait, I need a second part with the same structure. I need a bridge. I need a chorus. Let’s go. Let’s move to this place. Let’s change this rationally,” but the core has to be subconscious.

I imagine people with writer’s block feeling unable to think of something to write about. I haven’t had that problem, but I’ve had something where I have too many things I want to write about and I feel unable to focus on one for sustained periods, and it feels like writer’s block in that I feel stuck. I keep becoming interested in one of the other things and my motivation keeps changing or disappearing and it usually takes something major from outside, like a book contract, for me to finally focus on one thing.

We started at Caltech asking very simple questions: how do we understand the molecule dynamics or the dynamics of molecules, emotions and so on, molecules but in a coherent fashion.

I’m hungry for knowledge…Knowledge, knowledge and I loved it.

It was also evident to me that if you really want to achieve and do well in American society, you have to work, and work hard…You have to work, you have to work.

According to Egyptian regulations, the chairman of the department, the dean of the faculty of sciences, the president of Alexandria University, and the minister of higher education, they all have to sign off.

Today I was reading the latest issue of Nature, and somebody had written an editorial that said scientists should be basically directing their work to the service of society by making the discoveries that are relevant. The problem is I don’t know what’s relevant!

At the age of 21, as a Moeid, I believed that behind every universal phenomenon there must be beauty and simplicity in its description. This belief remains true today.