The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.

You can kill a man, but you can't kill an idea.

As I would not be a slave, so I would not be a master. This expresses my idea of democracy.

I believe in general in a dualism between facts and the ideas of those facts in human heads.

Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats.

The people who oppose your ideas are inevitably those who represent the established order that your ideas will upset.

An invasion of armies can be resisted, but not an idea whose time has come.

Congress seems drugged and inert most of the time... its idea of meeting a problem is to hold hearings or, in extreme cases, to appoint a commission.

I had a monumental idea this morning, but I didn't like it.

I can't understand why people are frightened of new ideas. I'm frightened of the old ones.

A good basic selling idea, involvement and relevancy, of course, are as important as ever, but in the advertising din of today, unless you make yourself noticed and believed, you ain't got nothin'.

Creative ideas flourish best in a shop which preserves some spirit of fun. Nobody is in business for fun, but that does not mean there cannot be fun in business.

To swear off making mistakes is very easy. All you have to do is swear off having ideas.

I have learned to respect ideas, wherever they come from. Often they come from clients. Account executives often have big creative ideas, regardless of what some writers think.

If an ad campaign is built around a weak idea - or as is so often the case, no idea at all - I don't give a damn how good the execution is, it's going to fail.

If you have a good selling idea, your secretary can write your ad for you.