The unprepared mind cannot see the outstretched hand of opportunity.

The time may come when penicillin can be bought by anyone in the shops. Then there is the danger that the ignorant man may easily underdose himself and by exposing his microbes to non-lethal quantities of the drug make them resistant.

In nature nothing exists alone.

-- Rachel Carson

The more clearly we can focus our attention on the wonders and realities of the universe about us, the less taste we shall have for destruction.

-- Rachel Carson

There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.

-- Charles Darwin

The duty of the man who investigates the writings of scientists, if learning the truth is his goal, is to make himself an enemy of all that he reads.

-- Ibn al-Haytham

It's easier to ask forgiveness than it is to get permission.

-- Grace Hopper

The most dangerous phrase in the language is: 'We've always done it this way.'

-- Grace Hopper