Because there are little to no consequences for conducting cyberattacks, criminals and nation-states are becoming bolder in their threats and behavior. Russia, China, North Korea and Iran are increasingly hacking into U.S. companies and government networks for espionage purposes or financial gain.

Criminal and terrorist threats are morphing beyond traditional actors and tactics. We still have to worry about things like an al-Qaida cell plotting a large-scale attack, but we also now have to worry increasingly about homegrown violent extremists radicalizing in the shadows.

When we think of the major threats to our national security, the first to come to mind are nuclear proliferation, rogue states and global terrorism. But another kind of threat lurks beyond our shores, one from nature, not humans - an avian flu pandemic.

Extremism in defense of liberty is not a vice, but I denounce political extremism, of the left or the right, based on duplicity, falsehood, fear, violence and threats when they endanger liberty.

We need a foreign policy that distinguishes America's friends from her enemies, and recognizes the true threats that we face.

Freedom of speech, for those who don't accept multiculturalism or the sexual revolution, is increasingly limited, mainly by threats to the jobs of those who speak out of turn.

He who threatens us will find us deaf to his threats. We are willing to listen only to rational arguments.

Nixon did have a secret plan, and I knew that it involved making threats of nuclear war to North Vietnam.

I think isolationism is a mistake, no matter what party you see it in. We have to remember that there are two threats to our freedom: there's a threat that comes from the federal government, from the Obama Administration policies... but there's also a huge and significant threat from al-Qaeda.

If what you do is being threatened as a profession, that could be scary. But that's the same reason why I walked out on stage many times after receiving death threats. I couldn't live without doing what I wanted to do. So at the same time I have to be willing to die for it.

Israel is a beacon of hope, freedom and liberty surrounded by existential threats.

I'm proud to stand up and defend against threats to our Second Amendment rights in Congress.

Israel is following policies which maximise its security threats... policies which choose expansion over security... policies which lead to their moral degradation, their isolation, their delegitimation, as they call it now, and very likely ultimate destruction. That's not impossible.

Over most of history, threats have come from nature - disease, earthquakes, floods, and so forth. But the worst now come from us. We've entered a geological era called the anthropocene. This started, perhaps, with the invention of thermonuclear weapons.

Jews have been harmed by the threats to freedom of opinion and debate, the punishments for candor, and the decline in rigorous standards in the academy that have accompanied progressive hegemony, which insists upon the sacrosanct status of affirmative action and other policies favored by the left.

Direct threats require decisive action.

Behaving morally because of a hope of reward or a fear of punishment is not morality. Morality is not bribery or threats. Religion is bribery and threats. Humans have morality. We don't need religion.

As cyber threats evolve, we need to evolve as well.

Empty threats are often worse than saying nothing at all. It's like leading from behind. Eventually, no one thinks you're leading at all. And after a while, no one is even listening.

Denial, panic, threats, anger - those are very human responses to feeling guilt.