Children want the challenge of difficult tasks - just look how much better they are than their parents on a computer.

I made 5,127 prototypes of my vaccum before I got it right. There were 5,126 failures. But I learned from each one. That’s how I came up with a solution. So I don’t mind failure.

What I've learned from running is that the time to push hard is when you're hurting like crazy and you want to give up. Success is often just around the corner.

Enjoy failure and learn from it. You never learn from success.

Everyone gets knocked back, no one rises smoothly to the top without hindrance. The ones who succeed are those who say, right, let’s give it another go.

Successes teach you nothing. Failures teach you everything. Making mistakes is the most important thing you can do.

Everyone has ideas. They may be too busy or lack the confidence or technical ability to carry them out. But I want to carry them out. It is a matter of getting up and doing it.

In order to fix it, you need a passionate anger about something that doesn't work well.

Engineering undergraduates should not be charged fees. They should receive grants, not student loans, and the government will get the money back long-term from increased exports.

If you want to do something different, you’re going to come up against a lot of naysayers.

Designing aircraft and racing cars is an extremely exciting thing.

Bright star of Eanna, forgive me the manner of this, but you are the harbor of my soul’s journeying.

Your greatest asset is your earning ability. Your greatest resource is your time.

Every generation needs regeneration

I argue with myself, get mad at myself, throw myself around the room and then apologize to myself.

To know the laws that govern the winds, and to know that you know them, will give you an easy mind on your voyage round the world; otherwise you may tremble at the appearance of every cloud.

Nothing shows the kind of fool you are as quick as your tongue.

Like all mad men, I thought everyone was mad except myself.

Every aspect of Obamacare is an affront to the very founding of this country.

The fool rushed to certain conclusions. The middling man approached them warily, and with circumspection. And the wise man, perceiving them from afar, decided to go round another way.

Emotional sympathies just dry up and die as we change, and they are as mysterious in friendship as in love. It's a relationship like any other.