I have often endeavoured to view the circulation of the blood in terrestrial animals, but without success, by reason that no parts of their bodies were sufficiently transparent.

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• Antonie van Leeuwenhoek:

  If we now plainly perceive that the passage of the blood from the arteries into the veins of the ta

• Antonie van Leeuwenhoek:

  People who look for the first time through a microscope say, 'Now I see this, and then I see that,'

• Antonie van Leeuwenhoek:

  My determination is not to remain stubbornly with my ideas, but I'll leave them and go over to othe

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  When I have supped too heavily of an evening, I drink in the morning a large number of cups of coff

• Antonie van Leeuwenhoek:

  Life lives on life - it is cruel, but it is God's will. And it is for our good, of course, because

• Antonie van Leeuwenhoek:

  I've never taught one, because if I taught one, I'd have to teach others... I would give myself ove

• Antonie van Leeuwenhoek:

  For my part, I would say that the male sperm and seeds of plants have been penetrated so far that t

• Antonie van Leeuwenhoek:

  Man comes not from an egg but from an animalcule that is found in male sperm.

• Antonie van Leeuwenhoek:

  Just as the supposed number may differ from the true number by fully 100, 150, or even 200 in a flo

• Antonie van Leeuwenhoek:

  I must confess... I don't know any tongue but the Nether-Dutch.