In any family, the joy of a wedding must be tinged with a little anxiety. So many marriages fail. Luckily, people often get over such traumas. But for the Royal Family, marriages carry the gravest dangers.

I make no apologies in admitting that I take very seriously the dehumanizing dangers in our tendency in modern science to make man over into the image of the machine, into the image of the techniques by which we study him.

A move to a different town or school gives us new places to explore, new people to meet; a lost pet means we have to organize a careful search; baby-sitting requires looking out for dangers a young child can't foresee; a car crash or fire demands that we get help immediately.

The greatest dangers to liberty lurk in the insidious encroachment by men of zeal, well meaning but without understanding.

There are the medical dangers of football in general caused by head trauma over repetitive hits.

Learning carries within itself certain dangers because out of necessity one has to learn from one's enemies.

I believe human beings mark a threshold in the development of the planet, of course, but it is only part of the picture. What Big History can do is show us the nature of our complexity and fragility and the dangers that face us, but it can also show us our power, with collective learning.

Since taking office, President Obama has worked to restore a positive vision of American leadership in the world - leadership defined, not by the threats and dangers that we will oppose, but by the security, opportunity and dignity that America advances in partnership with people around the world.

One of the functions of intelligence is to take account of the dangers that come from trusting solely to the intelligence.

Artificial intelligence is just a new tool, one that can be used for good and for bad purposes and one that comes with new dangers and downsides as well. We know already that although machine learning has huge potential, data sets with ingrained biases will produce biased results - garbage in, garbage out.

One can never speak enough of the virtues, the dangers, the power of shared laughter.

Understanding the long, sordid history of gun control in America is key to understanding the dangers of disarming.

How great are the dangers I face to win a good name in Athens.

I experience for the American officers and soldiers that friendship which arises from having shared with them for a length of time dangers, sufferings, and both good and evil fortune.

Freedom always deals with 'the possible'; this gives freedom its great flexibility, its fascination, and its dangers.

Whatever the immediate gains and losses, the dangers to our safety arising from political suppression are always greater than the dangers to the safety resulting from political freedom. Suppression is always foolish. Freedom is always wise.

We are willing enough to praise freedom when she is safely tucked away in the past and cannot be a nuisance. In the present, amidst dangers whose outcome we cannot foresee, we get nervous about her, and admit censorship.

Freedom of conscience entails more dangers than authority and despotism.

Our nation's Social Security Trust Fund is depleting at an alarming rate, and failure to implement immediate reforms endangers the ability of Americans to plan for their retirement with the options and certainty they deserve.

Humans are distinguished from other species by a massive brain that enables us to imagine a future and influence it by what we do in the present. By using experience, knowledge and insight, our ancestors recognized they could anticipate dangers and opportunities and take steps to exploit advantages and avoid hazards.

Climate change is the central environmental ill of our time. We have an obligation to protect our children from the dangers of this widening scourge, and we aren't yet doing enough about it.

Internet safety begins at home and that is why my legislation would require the Federal Trade Commission to design and publish a unique website to serve as a clearinghouse and resource for parents, teachers and children for information on the dangers of surfing the Internet.

I am one who believes that one of the greatest dangers of advertising is not that of misleading people, but that of boring them to death.

We cannot banish dangers, but we can banish fears. We must not demean life by standing in awe of death.