User Control · Throughout iOS, people—not apps—are in control. An app can suggest a course of action or warn about dangerous consequences, but it’s usually a mistake for the app to take over the decision-making. The best apps find the correct balance between enabling users and avoiding unwanted outcomes.

Clarity · Throughout the system, text is legible at every size, icons are precise and lucid, adornments are subtle and appropriate, and a sharpened focus on functionality motivates the design.

Clarity · Negative space, color, fonts, graphics, and interface elements subtly highlight important content and convey interactivity.

Deference · Fluid motion and a crisp, beautiful interface help people understand and interact with content while never competing with it. Content typically fills the entire screen, while translucency and blurring often hint at more.

Deference · Minimal use of bezels, gradients, and drop shadows keep the interface light and airy, while ensuring that content is paramount.

Depth · Distinct visual layers and realistic motion convey hierarchy, impart vitality, and facilitate understanding. Touch and discoverability heighten delight and enable access to functionality and additional content without losing context. Transitions provide a sense of depth as you navigate through content.

Aesthetic integrity · It represents how well an app’s appearance and behavior integrate with its function. For example, an app that helps people perform a serious task can keep them focused by using subtle, unobtrusive graphics, standard controls, and predictable behaviors.

Aesthetic integrity · An immersive app, such as a game, can deliver a captivating appearance that promises fun and excitement, while encouraging discovery.

Consistency · A consistent app implements familiar standards and paradigms by using system-provided interface elements, well-known icons, standard text styles, and uniform terminology. The app incorporates features and behaviors in ways people expect.

Direct Manipulation · The direct manipulation of onscreen content engages people and facilitates understanding. Users experience direct manipulation when they rotate the device or use gestures to affect onscreen content. Through direct manipulation, they can see the immediate, visible results of their actions.

Feedback · It acknowledges actions and shows results to keep people informed. The built-in iOS apps provide perceptible feedback in response to every user action.

Feedback · Interactive elements are highlighted briefly when tapped, progress indicators communicate the status of long-running operations, and animation and sound help clarify the results of actions.

Metaphors · People learn more quickly when an app’s virtual objects and actions are metaphors for familiar experiences—whether rooted in the real or digital world.

Metaphors · They work well in iOS because people physically interact with the screen. They move views out of the way to expose content beneath. They drag and swipe content. They toggle switches, move sliders, and scroll through picker values. They even flick through pages of books and magazines.

User Control · An app can make people feel like they’re in control by keeping interactive elements familiar and predictable, confirming destructive actions, and making it easy to cancel operations, even when they’re already underway.

I don't just want to upset people and shock people by saying something really outrageous.

I think people love fundamental science.

Maturity begins when you feel you are right about something without feeling the need to prove someone else wrong.

The recycling in my house was imposed by my kids.

One simply cannot pay tribute to Stephen Covey without saying at the outset that he was a lovely human being.

I feel sorry for generations of Labour voters and supporters who must look and wonder what on earth has gone wrong and what Labour is for.

Brick walls are there for a reason. The brick walls aren't there to keep us out. The brick walls are there to show us how badly we want things.

I don't know if you can catch my vibe, but I'm a pretty laid-back guy.

You can't influence people you refuse to associate with.

In America few people will trust you unless you are irreverent.

I love the stage, but it doesn't pay the mortgage.

It's not enough to attend church and pray every Sunday; you have to act.

If you want the ultimate thrill, you've got to be willing to pay the ultimate price.

The Western musical canon came about not merely by accumulation, but by opposition and subversion, both to the ruling powers on whom composers depended for their livelihoods and to other musics.

When you're shooting with long lenses, even if you're shooting a close-up, you feel the air, the distance between the camera and the subject.

Through the years, I have so many wonderful memories of playing with the Red Wings: winning four Stanley Cups, scoring big goals, going into battle every night side by side with my teammates, playing with every ounce of effort I could muster.

I wanted to go to school for public relations, and I also wanted to minor in dance. And Hofstra had two really good programs for both of those, so that's why I ended up there.

I'm not a fan of identity politics.

If I were to wait only for roles that clarify my racial makeup, I'd be waiting for a very, very long time.

I gather from a lawyer that there was a rehearsal yesterday. We haven't a hope. I know the presiding judge too: I've had the misfortune to sleep with his wife. He was specially picked.

The little I know I owe to my ignorance.

My mother is from Compton, California, but my father is from Hayneville, Alabama, and that's less than 20 miles from Selma.

I see no reason for giving the capital employed in agriculture greater protection than the capital vested in other branches of trade, manufacture, or commerce.

The Scriptures of the Old and New Testament, said an eminent scholar, have God for their Author, the Salvation of mankind for their end, and Truth without any mixture of error for their matter.