Growth is sustainable when new customers are acquired from the actions of previous customers.

Startups need a specially designed form of management to cater to their very particular needs as fledgling companies.

Validated learning is the process by which employees can measure their output and success through experiential lessons. The more validated learning achieved, the more successful a startup can become.

The Build-Measure-Learn feedback loop is the steering mechanism by which a startup can drive toward its end goal.

Innovation accounting informs the Build-Measure-Learn feedback loop that gives startups the information needed to decide when to persevere and when to pivot without being reactionary.

The ability to know when to continue on a path or to change direction is vital to the future of a startup.

Lean startup entrepreneurs cannot rely on hunches or assumptions. They must get out there and see what’s happening for themselves.

A lean startup employs a small-batch approach. Before embarking on a lengthy journey toward product development, the company leaders first test out smaller iterations to be sure that what they are creating is valuable.

Speed is a life-or-death necessity for a startup, but quality should not be sacrificed in a bid to accelerate.

Intrapreneurs—entrepreneurs tasked with creating new products or ventures within an existing corporation—should also use the lean startup method.

The day I got my first letter from a fan, I felt like I'd been touched by an angel.

I've always written about animals. I'm still trying to process why that is.

Pick up a yardstick to measure your life against anyone else's, and you've just picked up a stick and beaten up your own soul.

As a citizen, as a public scientist, I can tell you that Einstein essentially overturned a so strongly established paradigm of science, whereas Darwin didn't really overturn a science paradigm.

As an artist, it's possible to get tired of yourself.

My interactions with Sorkin were agonisingly weird. He is by far the weirdest person I have ever met. I had dinner with him and a few hours before I got an e-mail from his assistant saying, 'Sean, this does not need to be a long conversation. Aaron is only going to use it to win your trust.'

I thought of a lot of people from the same era when I was making a lot of records that had continued making a lot of records. A lot of it didn't seem terribly inspired.

When public spending in the form of transfer payments makes various services and benefits free of charge, work is discouraged. Yet it is precisely Social Security that legislators fear to cut.

A thug only understands you when you speak his language

The great gift of the human imagination is that it has no limits or ending.

Just living is not enough...one must have sunshine, freedom, and a little flower.

Find somebody to be successful for. Raise their hopes. Think of their needs.

When everyone is included, everyone wins.

I would say that the energy on set is always the energy of the director because he's the boss.

If you are in a spaceship that is traveling at the speed of light, and you turn on the headlights, does anything happen?

The sciences have ever been the surest guides to virtue.

I support anything that broadens the message of gender equality and tempers the stigma of the feminist label. We run into trouble, though, when we celebrate celebrity feminism while avoiding the actual work of feminism.

We all need poetry. The moments in our lives that are characterized by language that has to do with necessity or the market, or just, you know, things that take us away from the big questions that we have, those are the things that I think urge us to think about what a poem can offer.

I don't believe in 'greatest'. I believe in favorites.

When it all got taken away, I was becoming a young man. So I had to sacrifice to leave my family... Sleeping in my car, getting an apartment for a month and getting evicted the next month. Staying in the $25, $50 hotels.

I know that, for me, I need to try to cover myself while breastfeeding so that no one snaps a picture. If this wasn't the case, I probably wouldn't mind as much because my son is my biggest concern. My attitude is, if someone sees a little somethin' somethin', don't look if you don't like it.

I've gotten better at not making people feel uncomfortable with my shyness.

Though the contradictions of war seem sudden and simultaneous history stalks before it strikes. Something tolerated soon becomes something good.

I try to stay away from all the blogs and messages boards.