I doubt that Fleming could have obtained a grant for the discovery of penicillin on that basis [a requirement for highly detailed research plans] because he could not have said, 'I propose to have an accident in a culture so that it will be spoiled by a mould falling on it, and I propose to recognize the possibility of extracting an antibiotic from this mould.'

The fairest thing we can experience is the mysterious. It is the fundamental emotion which stands at the cradle of true science. He who knows it not, and can no longer wonder, no longer feel amazement, is as good as dead. We all had this priceless talent when we were young. But as time goes by, many of us lose it. The true scientist never loses the faculty of amazement. It is the essence of his being.

Adopting the right attitude can convert a negative stress into a positive one.

Even after the greatest defeats, the depressing thought of being a failure is best combated by taking stock of all your past achievements.

Random search for data on ... off-chance is hardly scientific. A questionnaire on 'Intellectual Immoralities' was circulated by a well-known institution. 'Intellectual Immorality No. 4' read: 'Generalizing beyond one's data'. [Wilder Dwight] Bancroft asked whether it would not be more correct to word question no. 4 'Not generalizing beyond one's data.

It is generally assumed that recurrent miscarriage may be due to progesterone deficiency, hypothyroidism or vitamin E deficiency and should be treated in theses cases with progesterone, thyroid extracts and vitamin E respectively. In theory, thyroid therapy appears to be the least well-founded, especially when applied to women without manifest signs of hypothyroidism, yet among the measures mentioned above it is most frequently claimed to have been successful.

Leaders are leaders only as long as they have the respect and loyalty of their followers.