We know we need bosses and deadlines to help us get work done. But sometimes we can also use an external push to make us have a good time. In both cases, our future self will appreciate the help.

We know we must win the war on terror to protect innocent people and the freedoms that define our way of life.

We know we cannot underestimate the importance of emergency planning in our region, nor can we assume we'll have ample warning time. If an earthquake or terrorist attack hits, we won't necessarily have advance alerts or opportunities to double- and triple-check our plans.

We know we cannot plant seeds with closed fists. To sow, we must open our hands.

We know we cannot be kind to animals until we stop exploiting them -- exploiting animals in the name of science, exploiting animals in the name of sport, exploiting animals in the name of fashion, and yes, exploiting animals in the name of food.

We know we cannot achieve our twin goals of ending poverty and boosting shared prosperity without ending poverty and creating equality for women and girls.

We know we can't win the Cup every year. But we certainly can be in position to win the Cup every year, and if we've done that, I think we've earned our paycheck.

We know we can't stop every act of violence, every act of evil in the world, but maybe we could try to stop one act of evil, one act of violence.

We know we are entering a period of transformation in aged care.

We know way too many words of wisdom, but perform all too few actions of wisdom.

We know virtually all of the genes known to mammals. We do not know all of the combinations.

We know very little, and yet it is astonishing that we know so much, and still more astonishing that so little knowledge can give us so much power.

We know very little about the universe. I personally don't believe it's uniform and the same everywhere. That's like saying the earth is flat.

We know too well that our freedom is incomplete without the freedom of the Palestinians.

We know too much, and are convinced of too little. Our literature is a substitute for religion, and so is our religion.

We know too much and feel too little.

We know too little about how life began on Earth to lay confident odds. It may have involved a fluke so rare that it happened only once in the entire galaxy. On the other hand, it may have been almost inevitable, given the right environment.

We know too little about global wealth dynamics, so we need international transmission of bank information.

We know today about nutrition and we know about exercise. There's no reason for anybody to be sick and tired, fat and out of shape -- it's ridiculous! This has got to be taught in the schools. It's got to be taught in kindergarten. That's when kids should first get the idea that the most important thing in your life is your health and your body.