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Lazzaro Spallanzani
(12 Jan 1729 - 11 Feb 1799)
Italian biologist and physiologist.
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Science Quotes by Lazzaro Spallanzani (2 quotes)
If I set out to prove something, I am no real scientist—I have to learn to follow where the facts lead me—I have to learn to whip my prejudices.
— Lazzaro Spallanzani
Attributed, as cited in Peter McDonald (ed.), Oxford Dictionary of Medical Quotations (2004), 95. Quoted earlier without citation as “If I want to find truth, I must have an open mind. I have to learn to follow where the facts lead me—I have to learn to whip my prejudices,” in World Order (1948), 14, 76.
Let us now recapitulate all that has been said, and let us conclude that by hermetically sealing the vials, one is not always sure to prevent the birth of the animals in the infusions, boiled or done at room temperature, if the air inside has not felt the ravages of fire. If, on the contrary, this air has been powerfully heated, it will never allow the animals to be born, unless new air penetrates from outside into the vials. This means that it is indispensable for the production of the animals that they be provided with air which has not felt the action of fire. And as it would not be easy to prove that there were no tiny eggs disseminated and floating in the volume of air that the vials contain, it seems to me that suspicion regarding these eggs continues, and that trial by fire has not entirely done away with fears of their existence in the infusions. The partisans of the theory of ovaries will always have these fears and will not easily suffer anyone's undertaking to demolish them.
— Lazzaro Spallanzani
Nouvelles Recherches sur les Découvertes Microscopiques, et la Génération des Corps Organisés (1769), 134-5. Quoted in Jacques Roger, The Life Sciences in Eighteenth-Century French Thought, ed. Keith R. Benson and trans. Robert Ellrich (1997), 510-1.
See also:
- 12 Jan - short biography, births, deaths and events on date of Spallanzani's birth.
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
(1987) -- 
