No doubt, man will continue to weigh and to measure, watch himself grow, and his Universe around him and with him, according to the ever growing powers of his tools.

Man has now become an adjunct to perfect and carry forward these conquests.

But, in the name of the experimental method and out of our poor knowledge, are we really entitled to claim that everything happens by chance, to the exclusion of all other possibilities?

Looking back 25 years later, what I may say is that the facts have been far better than the dreams. In the long course of cell life on this earth it remained, for our age for our generation, to receive the full ownership of our inheritance.

As far as I remember, even younger than eight, I have always been guided by reason. Not cold reason, but that which leads to the truth, to the real, and to sane Justice.

The cell, over the billions of years of her life, has covered the earth many times with her substance, found ways to control herself and her environment, and insure her survival.

Man, like other organisms, is so perfectly coordinated that he may easily forget, whether awake or asleep, that he is a colony of cells in action, and that it is the cells which achieve, through him, what he has the illusion of accomplishing himself.

We have entered the cell, the Mansion of our birth, and started the inventory of our acquired wealth.

This attempt to isolate cell constituents might have been a failure if they had been destroyed by the relative brutality of the technique employed. But this did not happen.

For this equilibrium now in sight, let us trust that mankind, as it has occurred in the greatest periods of its past, will find for itself a new code of ethics, common to all, made of tolerance, of courage, and of faith in the Spirit of men.

For over two billion years, through the apparent fancy of her endless differentiations and metamorphosis the Cell, as regards its basic physiological mechanisms, has remained one and the same. It is life itself, and our true and distant ancestor.

Is it absurd to imagine that our social behavior, from amoeba to man, is also planned and dictated, from stored information, by the cells? And that the time has come for men to be entrusted with the task, through heroic efforts, of bringing life to other worlds?

Once Ptolemy and Plato, yesterday Newton, today Einstein, and tomorrow new faiths, new beliefs, and new dimensions.

When I went to the University, the medical school was the only place where one could hope to find the means to study life, its nature, its origins, and its ills.

For the resolving powers of our scientific instruments decide, at a given moment, of the size and the vision of our Universe, and of the image we then make of ourselves.

This familiarity with a respected physician and my appreciation of his work, or the tragedy I experienced with the long, tormented agony and death of my mother might have influenced me in wanting to study medicine. It was not the case.

No doubt, man will continue to weigh and to measure, watch himself grow, and his Universe around him and with him, according to the ever growing powers of his tools.

Small bodies, about half a micron in diameter, and later referred to under the name of 'mitochondria' were detected under the light microscope as early as 1894.

It is the cells which create and maintain in us, during the span of our lives, our will to live and survive, to search and experiment, and to struggle.

There is no rational reason to doubt that the universe has existed indefinitely, for an infinite time. It is only myth that attempts to say how the universe came to be, either four thousand or twenty billion years ago.

When in doubt wear red.

As I think through the issue of funding the rebuilding of Iraq, I think about the analogy of a bankruptcy proceeding. There is no doubt that Iraq as a country is bankrupt.

After having dispatched a meal, I went ashore, and found no habitation save a single house, and that without an occupant; we had no doubt that the people had fled in terror at our approach, as the house was completely furnished.

If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.

We criticize, copy, patronize, idolize and insult but we never doubt that the U.S. has a unique position in the history of human hopes.

If you've got talent, stick with it... because talent wins out, without a doubt.

That a great battle must soon be fought no one could doubt; but, in the apparent and perhaps real absence of plan on the part of Lee, it was impossible to foretell the precise scene of the encounter.

I would not be gotten into a schoolhouse until I was eight years old. Nor did I accomplish much after I started. I doubt if I had gone to school six months in all when my father died. I was fourteen at the time.

No doubt Western civilization has in the past been full of wars and revolutions, and the national elements in our culture, even when they were ignored, always provided an unconscious driving force of passion and aggressive self-assertion.

You have to not listen to the nay sayers because there will be many and often they'll be much more qualified than you and cause you to sort of doubt yourself.

It has since been agreed that speeches given in English will be translated into French and vice versa, and even into German and Italian when necessary. No doubt translations into Esperanto will also soon be in demand.

Who has suffered? The families of the dead, no doubt. But a greater loss was inflicted on Pakistan because, as I said, we lost the pillars of our society.

I find that the best way to do things is to constantly move forward and to never doubt anything and keep moving forward, if you make a mistake say you made a mistake.

I know that we're being inexorably taken over by the Americans. Without a doubt. I don't mean invaded or anything like that, just taken over. By degrees.

My esoteric doctrine, is that if you entertain any doubt, it is safest to take the unpopular side in the first instance. Transit from the unpopular, is easy... but from the popular to the unpopular is so steep and rugged that it is impossible to maintain it.

What matters to us, the judgment of men? What have we to doubt, since we are pure before life?

Doubt is part of all religion. All the religious thinkers were doubters.

Should doubt knock at your doorway, just say to those skeptical, disturbing, rebellious thoughts, I propose to stay with my faith, with the faith of my people.

When in doubt, take more time.

The road to perseverance lies by doubt.

It's a technical, fairly difficult job that has no particular political connotations, so I doubt there are any big campaign contributors dying to be on the Fed. And remember, it doesn't pay very well, certainly by Republican standards.

We work n the dark - we do what we can - we give what we have. Our doubt is our passion and our passion is our task. The rest is the madness of art.

Roger King is, without a doubt, the greatest salesman in the history of anything. And I don't ever limit him just to television. He could sell you anything.

In arriving at a decision in a question of doubt, the apostles in the Acts were guided solely by their sense of the Spirit behind the action, not by any speculations as to consequences which might ensue. And so they found the truth.

To get an Oscar would be an incredible moment in my career, there is no doubt about that. But the 'Lord of the Rings' films are not made for Oscars, they are made for the audience.

I no doubt deserved my enemies, but I don't believe I deserved my friends.

If you look at the whole thing, I think the most gratifying thing is my kids, without a doubt.

They who have conquered doubt and fear have conquered failure.

The courage to be is rooted in the God who appears when God has disappeared in the anxiety of doubt.