Eventually we'll realize that if we destroy the ecosystem, we destroy ourselves.

If all the insects were to disappear from the earth, within 50 years all life on earth would end. If all human beings disappeared from the earth, within 50 years all forms of life would flourish.

There is hope in dreams, imagination, and in the courage of those who wish to make those dreams a reality.

Good parents give their children Roots and Wings. Roots to know where home is, wings to fly away and exercise what's been taught them.

[Who owns the patent on this vaccine?] Well, the people, I would say. There is no patent. Could you patent the sun?

Risks, I like to say, always pay off. You learn what to do, or what not to do.

Your dreams tell you what to do; your reason tells you how to do it.

It is always with excitement that I wake up in the morning wondering what my intuition will toss up to me, like gifts from the sea. I work with it and rely on it. It's my partner.

I see the triumph of good over evil as a manifestation of the error-correcting process of evolution.

The most important question we must ask ourselves is, 'Are we being good ancestors?'

I feel that the greatest reward for doing is the opportunity to do more.

Creativity is the residue of time wasted.

The ability to focus is the key separation point between those who move ahead and those who fall behind.

Nature appears not to have intended that any flower should be fertilized by its own pollen.

Nothing is too high for a man to reach, but he must climb with care and confidence

WE [black women] HAVE ADAPTED TO A SOCIETY THAT DOES'NT HONOR US.

Ninety percent of my best friends back home are plumbers, electricians, builders, or landscapers. Most of our dads worked in trades.

The best things in life are often the ones hardest to get. Yet they are also the ones that are the easiest to find, usually right in front of your face.

At his best, Obama promised to work with Republicans to reduce the deficit in a way that honors both individualism and community.

Learning is not watching a video, learning is taking action and seeing what happens.

My body is not good for prostrations.