As a world leader, America must be prepared to confront any challenge.
Terrorism can never be accepted. We must fight it together, with methods that do not compromise our respect for the rule of law and human rights, or are used as an excuse for others to do so.
Knowledge is like money: to be of value it must circulate, and in circulating it can increase in quantity and, hopefully, in value.
To reach a port, we must sail - sail, not tie at anchor - sail, not drift.
I must admit I like to muck around a bit; I always have.
We must face the fact that the preservation of individual freedom is incompatible with a full satisfaction of our views of distributive justice.
Any authentic work of art must start an argument between the artist and his audience.
I had often wondered how to best decolonize my people... It must be done one human being at a time. Without that kind of help, Western society does not allow people to come to terms with their feelings. With honesty and therapy, my people can be made whole again.
We must not be wise and prudent according to the flesh. Rather, we must be simple, humble and pure.
The burden of proof is now on the Palestinians... They must fight terrorism and dismantle its infrastructures in order to make possible progress on the roadmap.
There are times in politics when you must be on the right side and lose.
Social Security is a promise that we cannot and must not break.
If they want to criticize me, I don't care; I don't mind. But they must criticize me fairly. Usually, the criticism is not fair. Or the praise, even the praise sometimes is not fair.
You must understand the texture of your hair before you choose a style.
You must not fear death, my lads; defy him, and you drive him into the enemy's ranks.
He that will believe only what he can fully comprehend must have a long head or a very short creed.
Terrible is the fight put up by the senses. Fight bravely! Conquer them you must.
There is no man more dangerous, in a position of power, than he who refuses to accept as a working truth the idea that all a man does should make for rightness and soundness, that even the fixing of a tariff rate must be moral.
In order to be a diplomat, one must speak a number of languages, including doubletalk.
I have come a long way and learnt a lot. I read this quote about a year ago: 'Happiness must not be pursued; it must ensue.' It's made me realise that just being married again or something like that won't make me happy; the happiness ensues from how we live our lives.
Time is compressed like the fist I close on my knee... I hold inside it the clues and solutions and the power for what I must do now.
In a finite world this means that the per capita share of the world's goods must steadily decrease.
To become the best comedian, I must be well-rounded.
Physicists must feel they are in the most exciting field in the world. Their minds must be afire.
For the sin they do by two and two they must pay for one by one.
What to do when inspiration doesn't come; be careful not to spook, get the wind up, force things into position. You must wait around until the idea comes.
I appreciate recipes that tell you what can be changed and what must remain fixed. 'The Zuni Cafe Cookbook' by the late Judy Rodgers is superb at this.
We should always be learning. However, we must be careful not to set aside our faith in the process, because faith actually enhances our ability to learn.
May be is very well, but Must is the master. It is my duty to show justice without recompense.
Most people think that to meditate, I should feel a particular special something, and if I don't, then I must be doing something wrong.
To the revolutionary mind the American vista must have been almost as incredible as Genghis Khan's first view of China - so rich, so soft, so unaware.
Every soldier must know, before he goes into battle, how the little battle he is to fight fits into the larger picture, and how the success of his fighting will influence the battle as a whole.
When a child grows up without a father, there is an empty place where someone must stand, providing an example of character and confidence.
There ought to be an artistic depot where the artist need only hand in his artwork in order to receive what he asks for. As things are, one must be half a business man, and how can one understand - good heavens! - that's what I really call troublesome.
America won the Cold War by protecting our strategic resources from the threat of foreign control. We must bring the same attitude to our trade relationship with China.
America must not ignore the threat gathering against us. Facing clear evidence of peril, we cannot wait for the final proof, the smoking gun that could come in the form of a mushroom cloud.
