The most mature human insight comes from one's introspection rather than from exterior research.

Life begins when you do.

I have no ego investment in being on the air. I don't knock others for whom that kind of attention is like oxygen, but I don't miss anything about it.

If hemp could supply the energy needs of the United States, its value would be inestimable. Now that the drug czar is in final retreat, America has an opportunity to, once and for all, say farewell to the Exxon Valdez, Saddam Hussein and a prohibitively expensive brinkmanship in the desert sands of Saudi Arabia.

I've always thought that the stereotype of the dirty old man is really the creation of a dirty young man who wants the field to himself.

As the first human to land on any world outside the Earth, and probably the first living creature of any sort to come from the Earth and reach the Moon, his legacy will be safe as long as intelligent life survives in this corner of the cosmos.

To say, my fate is not tied to your fate, is like saying your end of the boat is sinking.

Television is the medium of the 20th century.