Jonas Salk

The greatest good is to do good to others.

The only way to predict the future is to create it.

The greatest use of life is to spend it for something that will outlast it.

The greatest thing in the world is to know how to belong to oneself.

The greatest pleasure in life is doing what people say you cannot do.

The greatest revolution of our generation is the discovery that human beings, by changing the inner attitudes of their minds, can change the outer aspects of their lives.

The greatest wealth is to live content with little.

The greatest thing you'll ever learn is just to love and be loved in return.

There is no such thing as a perfect vaccine, just as there is no such thing as a perfect anything. The goal is to make it as good as possible.

I have no doubt that the day will come when the public will be as concerned about the health of the planet as they are about the health of their children. And then we'll really be in trouble.

The greatest reward for a man's work is not what he gets for it, but what he becomes by it. And sometimes, what he becomes is a target for criticism.

Hope lies in dreams, in imagination, and in the courage of those who dare to make dreams into reality. And sometimes, reality bites.

If we are to have a future, we must be willing to change. And if we are to change, we must be willing to be uncomfortable. And if we are to be uncomfortable, we might as well laugh about it.

The most important question we can ask is, 'What are we doing for others?' And the second most important question is, 'Are we getting paid enough for it?'

I'm not a politician, I'm a scientist. Which means I'm used to dealing with facts, not opinions. It's a much more peaceful existence.

The only way to do great work is to love what you do. And sometimes, what you love to do is drive people crazy.

The greatest danger in times of turbulence is not the turbulence itself, but to act with yesterday's logic. And sometimes, yesterday's logic was just plain stupid.

It is not enough to be busy; so are the ants. The question is: What are we busy about? And is it worth the effort, or are we just making more ants?

The reward for work well done is the opportunity to do more. And sometimes, the reward is just more work.

I've often said that I'm not a hero, I'm just a guy who got lucky. And then had to deal with all the expectations that come with being lucky.