There are grounds for cautious optimism that we may now be near the end ofthe search for the ultimate laws of nature.

It’s not going to do any good to land on Mars if we’re stupid.

I definitely wasn’t anything special when I first started but I think I adapted quite quickly into racing and it became a bit better slowly. All of cadets, the first four years of karting, I only won one proper race, one! Which was the British Open Championship at PFI and I started 21st and I won.

The over-all point is that new technology will not necessarily replace old technology, but it will date it. By definition. Eventually, it will replace it. But it’s like people who had black-and-white TVs when color came out. They eventually decided whether or not the new technology was worth the investment.

In the literal sense, there has been no relevant evolution since the trek from Africa. But there has been substantial progress towards higher standards of rights, justice and freedom – along with all too many illustrations of how remote is the goal of a decent society.

He that lives upon hope will die fasting.

As scientists, we step on the shoulders of science, building on the work that has come before us – aiming to inspire a new generation of young scientists to continue once we are gone.

Has this world been so kind to you that you should leave with regret? There are better things ahead than any we leave behind.

When things are going bad, there’s going to be some good that’s going to come from it.

A Scout smiles and whistles under all circumstances.

In all my work, I try to say – ‚You may be given a load of sour lemons, why not try to make a dozen lemon meringue pies?‘

Each new generation born is in effect an invasion of civilization by little barbarians, who must be civilized before it is too late.

I believe that when you think of the negative, and you get up discouraged – ‚There’s nothing good in my future‘ – I really believe it almost ties the hands of God. God works where there’s an attitude of faith. I believe faith is all about hope.

The pessimist sees difficulty in every opportunity. The optimist sees the opportunity in every difficulty.

A lot of the things that will really improve the world fortunately aren’t dependent on Washington doing something different.

Rhetoric is a poor substitute for action, and we have trusted only to rhetoric. If we are really to be a great nation, we must not merely talk; we must act big.

I believe in pink. I believe that laughing is the best calorie burner. I believe in kissing, kissing a lot. I believe in being strong when everything seems to be going wrong. I believe that happy girls are the prettiest girls. I believe that tomorrow is another day and I believe in miracles.

Life is about growing and improving and getting better.

In the usual progress of things, the necessities of a nation in every stage of its existence will be found at least equal to its resources.

So while an incredible amount of progress has been made, on this fifth anniversary, I wanted to come here and tell the people of this city directly: My administration is going to stand with you – and fight alongside you – until the job is done. Until New Orleans is all the way back, all the way.

Man, unlike anything organic or inorganic in the universe, grows beyond his work, walks up the stairs of his concepts, emerges ahead of his accomplishments.

It seems that I have always been ahead of my time. I had to wait nineteen years before Niagara was harnessed by my system, fifteen years before the basic inventions for wireless which I gave to the world in 1893 were applied universally.

If that’s there, I believe that technology will probably step up to their part of it.

The only real progress lies in learning to be wrong all alone.

Nothing recedes like progress.

Man is, properly speaking, based upon hope, he has no other possession but hope; this world of his is emphatically the place of hope.

There is no hope unmingled with fear, and no fear unmingled with hope.

I’ve always believed that you can think positive just as well as you can think negative.

In order for us to have a future that’s exciting and inspiring, it has to be one where we’re a space-bearing civilization.

The most positive men are the most credulous.

China has to go along with world trends. That’s democracy, liberty, individual freedom. China sooner or later has to go that way. It cannot go backward.

Innovation is moving at a scarily fast pace.

Eradications are special. Zero is a magic number. You either do what it takes to get to zero and you’re glad you did it; or you get close, give up and it goes back to where it was before, in which case you wasted all that credibility, activity, money that could have been applied to other things.

Start your diet during a period of optimism and happiness.

People want to feel hopeful.

My view is that at a younger age your optimism is more and you have more imagination etc. You have less bias.

Even if I knew that tomorrow the world would go to pieces, I would still plant my apple tree.

Something I’ve realized lately, to my shock, is that I am an optimist, in that I think humans are almost infinitely capable of self-change and self-modification, and that we really can build the future that we want if we’re smart about it.

A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.

New roads; new ruts.

I know in my heart that man is good. That what is right will always eventually triumph. And there’s purpose and worth to each and every life.

Competition is not only the basis of protection to the consumer, but is the incentive to progress.

Our progress as a nation can be no swifter than our progress in education. The human mind is our fundamental resource.

Human nature is not nearly as bad as it has been thought to be.

It takes no more time to see the good side of life than it takes to see the bad.

Start wide, expand further, and never look back.

Without deviation progress is not possible.

Competition has been shown to be useful up to a certain point and no further, but cooperation, which is the thing we must strive for today, begins where competition leaves off.

It’s a pity that nobody has found an exploding black hole. If they had, I would have won a Nobel prize.

Nobody can ever say that being negative ever helped them at all – not in any way.

The spread of civilisation may be likened to a fire; first, a feeble spark, next a flickering flame, then a mighty blaze, ever increasing in speed and power.

Success is to be measured not so much by the position that one has reached in life as by the obstacles which he has overcome.

If you get up in the morning and think the future is going to be better, it is a bright day. Otherwise, it’s not.

We all have a tendency to avoid our weaknesses. When we do that, we never progress or get any better.

The task of the leader is to get his people from where they are to where they have not been.

The natural progress of things is for liberty to yield and government to gain ground.

Don’t despair, not even over the fact that you don’t despair.

Revolutions go not backward.

People deal too much with the negative, with what is wrong. Why not try and see positive things, to just touch those things and make them bloom?

The Middle East is hopeful. There’s hope there.

Our ambition should be to rule ourselves, the true kingdom for each one of us; and true progress is to know more, and be more, and to do more.