To invent, you need a good imagination and a pile of junk.

Don't mistake activity with achievement.

Effective communication is 20% what you know and 80% how you feel about what you know.

We struggle with the complexities and avoid the simplicities.

You can observe a lot just by watching.

Dictionary is the only place that success comes before work. Hard work is the price we must pay for success. I think you can accomplish anything if you're willing to pay the price.

If you're trying to create a company, it's like baking a cake. You have to have all the ingredients in the right proportion.

A great secret of success is to go through life as a man who never gets used up.

If it's me against 48, I feel sorry for the 48.

The secret of success is constancy to purpose.

Personally, I enjoy working about 18 hours a day. Besides the short catnaps I take each day, I average about four to five hours of sleep per night.

I am easily satisfied with the very best.

The more you are in this business, the more humbled by it you become.

You never achieve success unless you like what you are doing.

The production of too many useful things results in too many useless people.

Inspiration exists, but it has to find you working.

There is nothing impossible to him who will try.

When you play, play hard; when you work, don't play at all.

Find out what you really love to do, and then find a way to make a good living doing it.

Few things are impossible to diligence and skill. Great works are performed not by strength, but perseverance.

If your business is only to sweep a crossing, remember it is your duty to make that crossing the best swept of the world.